diff --git a/src/servala/frontend/templates/frontend/organizations/service_instance_update.html b/src/servala/frontend/templates/frontend/organizations/service_instance_update.html
index 51a9213..74259e6 100644
--- a/src/servala/frontend/templates/frontend/organizations/service_instance_update.html
+++ b/src/servala/frontend/templates/frontend/organizations/service_instance_update.html
@@ -22,7 +22,7 @@
                     {% translate "Oops! Something went wrong with the service form generation. Please try again later." %}
                 </div>
             {% else %}
-                {% include "includes/tabbed_fieldset_form.html" with form=form %}
+                {% include "includes/tabbed_fieldset_form.html" with form=custom_form expert_form=form %}
             {% endif %}
         </div>
     </div>
diff --git a/src/servala/frontend/templates/includes/tabbed_fieldset_form.html b/src/servala/frontend/templates/includes/tabbed_fieldset_form.html
index c34c41a..744df5f 100644
--- a/src/servala/frontend/templates/includes/tabbed_fieldset_form.html
+++ b/src/servala/frontend/templates/includes/tabbed_fieldset_form.html
@@ -6,48 +6,130 @@
       {% if form_action %}action="{{ form_action }}"{% endif %}>
     {% csrf_token %}
     {% include "frontend/forms/errors.html" %}
-    <ul class="nav nav-tabs" id="myTab" role="tablist">
-        {% for fieldset in form.get_fieldsets %}
-            {% if not fieldset.hidden %}
-                <li class="nav-item"
-                    role="presentation">
-                    <button class="nav-link {% if forloop.first %}active{% endif %}{% if fieldset.has_mandatory %} has-mandatory{% endif %}"
-                            id="{{ fieldset.title|slugify }}-tab"
-                            data-bs-toggle="tab"
-                            data-bs-target="#{{ fieldset.title|slugify }}"
-                            type="button"
-                            role="tab"
-                            aria-controls="{{ fieldset.title|slugify }}"
-                            aria-selected="{% if forloop.first %}true{% else %}false{% endif %}">
-                        {{ fieldset.title }}
-                        {% if fieldset.has_mandatory %}<span class="mandatory-indicator">*</span>{% endif %}
-                    </button>
-                </li>
-            {% endif %}
-        {% endfor %}
-    </ul>
-    <div class="tab-content" id="myTabContent">
-        {% for fieldset in form.get_fieldsets %}
-            <div class="tab-pane fade my-2 {% if fieldset.hidden %}d-none{% endif %}{% if forloop.first %}show active{% endif %}"
-                 id="{{ fieldset.title|slugify }}"
-                 role="tabpanel"
-                 aria-labelledby="{{ fieldset.title|slugify }}-tab">
-                {% for field in fieldset.fields %}
-                    {% with field=form|get_field:field %}{{ field.as_field_group }}{% endwith %}
-                {% endfor %}
-                {% for subfieldset in fieldset.fieldsets %}
-                    {% if subfieldset.fields %}
-                        <div>
-                            <h4 class="mt-3">{{ subfieldset.title }}</h4>
-                            {% for field in subfieldset.fields %}
-                                {% with field=form|get_field:field %}{{ field.as_field_group }}{% endwith %}
-                            {% endfor %}
-                        </div>
+    {% if form %}
+        <div class="mb-3">
+            <button type="button"
+                    class="btn btn-sm btn-outline-secondary ml-auto d-block"
+                    id="expert-mode-toggle">
+                <i class="bi bi-code-square"></i> {% translate "Show Expert Mode" %}
+            </button>
+        </div>
+    {% endif %}
+    <div id="custom-form-container" class="{% if form %}custom-crd-form{% else %}expert-crd-form{% endif %}">
+        {% if form and form.get_fieldsets|length == 1 %}
+            {# Single fieldset - render without tabs #}
+            {% for fieldset in form.get_fieldsets %}
+                <div class="my-2">
+                    {% for field in fieldset.fields %}
+                        {% with field=form|get_field:field %}{{ field.as_field_group }}{% endwith %}
+                    {% endfor %}
+                    {% for subfieldset in fieldset.fieldsets %}
+                        {% if subfieldset.fields %}
+                            <div>
+                                <h4 class="mt-3">{{ subfieldset.title }}</h4>
+                                {% for field in subfieldset.fields %}
+                                    {% with field=form|get_field:field %}{{ field.as_field_group }}{% endwith %}
+                                {% endfor %}
+                            </div>
+                        {% endif %}
+                    {% endfor %}
+                </div>
+            {% endfor %}
+        {% elif form %}
+            {# Multiple fieldsets or auto-generated form - render with tabs #}
+            <ul class="nav nav-tabs" id="myTab" role="tablist">
+                {% for fieldset in form.get_fieldsets %}
+                    {% if not fieldset.hidden %}
+                        <li class="nav-item"
+                            role="presentation">
+                            <button class="nav-link {% if forloop.first %}active{% endif %}{% if fieldset.has_mandatory %} has-mandatory{% endif %}"
+                                    id="{{ fieldset.title|slugify }}-tab"
+                                    data-bs-toggle="tab"
+                                    data-bs-target="#{{ fieldset.title|slugify }}"
+                                    type="button"
+                                    role="tab"
+                                    aria-controls="{{ fieldset.title|slugify }}"
+                                    aria-selected="{% if forloop.first %}true{% else %}false{% endif %}">
+                                {{ fieldset.title }}
+                                {% if fieldset.has_mandatory %}<span class="mandatory-indicator">*</span>{% endif %}
+                            </button>
+                        </li>
                     {% endif %}
                 {% endfor %}
+            </ul>
+            <div class="tab-content" id="myTabContent">
+                {% for fieldset in form.get_fieldsets %}
+                    <div class="tab-pane fade my-2 {% if fieldset.hidden %}d-none{% endif %}{% if forloop.first %}show active{% endif %}"
+                         id="{{ fieldset.title|slugify }}"
+                         role="tabpanel"
+                         aria-labelledby="{{ fieldset.title|slugify }}-tab">
+                        {% for field in fieldset.fields %}
+                            {% with field=form|get_field:field %}{{ field.as_field_group }}{% endwith %}
+                        {% endfor %}
+                        {% for subfieldset in fieldset.fieldsets %}
+                            {% if subfieldset.fields %}
+                                <div>
+                                    <h4 class="mt-3">{{ subfieldset.title }}</h4>
+                                    {% for field in subfieldset.fields %}
+                                        {% with field=form|get_field:field %}{{ field.as_field_group }}{% endwith %}
+                                    {% endfor %}
+                                </div>
+                            {% endif %}
+                        {% endfor %}
+                    </div>
+                {% endfor %}
             </div>
-        {% endfor %}
+        {% endif %}
     </div>
+    {% if form and expert_form %}
+        <div id="expert-form-container" class="expert-crd-form" style="display:none;">
+            <ul class="nav nav-tabs" id="expertTab" role="tablist">
+                {% for fieldset in expert_form.get_fieldsets %}
+                    {% if not fieldset.hidden %}
+                        <li class="nav-item"
+                            role="presentation">
+                            <button class="nav-link {% if forloop.first %}active{% endif %}{% if fieldset.has_mandatory %} has-mandatory{% endif %}"
+                                    id="expert-{{ fieldset.title|slugify }}-tab"
+                                    data-bs-toggle="tab"
+                                    data-bs-target="#expert-{{ fieldset.title|slugify }}"
+                                    type="button"
+                                    role="tab"
+                                    aria-controls="expert-{{ fieldset.title|slugify }}"
+                                    aria-selected="{% if forloop.first %}true{% else %}false{% endif %}">
+                                {{ fieldset.title }}
+                                {% if fieldset.has_mandatory %}<span class="mandatory-indicator">*</span>{% endif %}
+                            </button>
+                        </li>
+                    {% endif %}
+                {% endfor %}
+            </ul>
+            <div class="tab-content" id="expertTabContent">
+                {% for fieldset in expert_form.get_fieldsets %}
+                    <div class="tab-pane fade my-2 {% if fieldset.hidden %}d-none{% endif %}{% if forloop.first %}show active{% endif %}"
+                         id="expert-{{ fieldset.title|slugify }}"
+                         role="tabpanel"
+                         aria-labelledby="expert-{{ fieldset.title|slugify }}-tab">
+                        {% for field in fieldset.fields %}
+                            {% with field=expert_form|get_field:field %}{{ field.as_field_group }}{% endwith %}
+                        {% endfor %}
+                        {% for subfieldset in fieldset.fieldsets %}
+                            {% if subfieldset.fields %}
+                                <div>
+                                    <h4 class="mt-3">{{ subfieldset.title }}</h4>
+                                    {% for field in subfieldset.fields %}
+                                        {% with field=expert_form|get_field:field %}{{ field.as_field_group }}{% endwith %}
+                                    {% endfor %}
+                                </div>
+                            {% endif %}
+                        {% endfor %}
+                    </div>
+                {% endfor %}
+            </div>
+        </div>
+    {% endif %}
+    {% if form %}
+        <input type="hidden" name="active_form" id="active-form-input" value="custom">
+    {% endif %}
     <div class="col-sm-12 d-flex justify-content-end">
         <button class="btn btn-primary me-1 mb-1" type="submit">
             {% if form_submit_label %}
@@ -58,3 +140,6 @@
         </button>
     </div>
 </form>
+{% if form %}
+    <script defer src="{% static 'js/expert-mode.js' %}"></script>
+{% endif %}
diff --git a/src/servala/frontend/views/service.py b/src/servala/frontend/views/service.py
index 689f381..52b0c71 100644
--- a/src/servala/frontend/views/service.py
+++ b/src/servala/frontend/views/service.py
@@ -393,11 +393,75 @@ class ServiceInstanceUpdateView(
     def get_form_kwargs(self):
         kwargs = super().get_form_kwargs()
         kwargs["instance"] = self.object.spec_object
+        kwargs["prefix"] = "expert"
         return kwargs
 
+    def get_form(self, *args, ignore_data=False, **kwargs):
+        if not ignore_data:
+            return super().get_form(*args, **kwargs)
+        cls = self.get_form_class()
+        kwargs = self.get_form_kwargs()
+        if ignore_data:
+            kwargs.pop("data", None)
+        return cls(**kwargs)
+
+    def get_custom_form(self, ignore_data=False):
+        cls = self.object.context.custom_model_form_class
+        if not cls:
+            return
+        kwargs = self.get_form_kwargs()
+        kwargs["prefix"] = "custom"
+        if ignore_data:
+            kwargs.pop("data", None)
+        return cls(**kwargs)
+
+    @property
+    def is_custom_form(self):
+        # Note: "custom form" = user-friendly, subset of fields
+        # vs "expert form" = auto-generated (all technical fields)
+        return self.request.POST.get("active_form", "expert") == "custom"
+
+    def post(self, request, *args, **kwargs):
+        self.object = self.get_object()
+
+        if self.is_custom_form:
+            form = self.get_custom_form()
+        else:
+            form = self.get_form()
+
+        if form.is_valid():
+            return self.form_valid(form)
+        return self.form_invalid(form)
+
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        if self.request.method == "POST":
+            if self.is_custom_form:
+                context["custom_form"] = self.get_custom_form()
+                context["form"] = self.get_form(ignore_data=True)
+            else:
+                context["custom_form"] = self.get_custom_form(ignore_data=True)
+        else:
+            context["custom_form"] = self.get_custom_form()
+        return context
+
+    def _deep_merge(self, base, update):
+        for key, value in update.items():
+            if key in base and isinstance(base[key], dict) and isinstance(value, dict):
+                self._deep_merge(base[key], value)
+            else:
+                base[key] = value
+        return base
+
     def form_valid(self, form):
         try:
-            spec_data = form.get_nested_data().get("spec")
+            form_data = form.get_nested_data()
+            spec_data = form_data.get("spec")
+
+            if self.is_custom_form:
+                current_spec = dict(self.object.spec) if self.object.spec else {}
+                spec_data = self._deep_merge(current_spec, spec_data)
+
             self.object.update_spec(spec_data=spec_data, updated_by=self.request.user)
             messages.success(
                 self.request,
diff --git a/src/servala/static/js/expert-mode.js b/src/servala/static/js/expert-mode.js
new file mode 100644
index 0000000..d83bb69
--- /dev/null
+++ b/src/servala/static/js/expert-mode.js
@@ -0,0 +1,48 @@
+(function() {
+    'use strict';
+
+    let isExpertMode = false;
+
+    function initExpertMode() {
+        const toggleButton = document.getElementById('expert-mode-toggle');
+        if (!toggleButton) return;
+
+        const customFormContainer = document.getElementById('custom-form-container');
+        const expertFormContainer = document.getElementById('expert-form-container');
+
+        if (!customFormContainer || !expertFormContainer) {
+            console.warn('Expert mode containers not found');
+            return;
+        }
+
+        toggleButton.addEventListener('click', function() {
+            isExpertMode = !isExpertMode;
+
+            const activeFormInput = document.getElementById('active-form-input');
+
+            if (isExpertMode) {
+                customFormContainer.style.display = 'none';
+                expertFormContainer.style.display = 'block';
+                toggleButton.innerHTML = '<i class="bi bi-code-square-fill"></i> Show Simplified Form';
+                if (activeFormInput) activeFormInput.value = 'expert';
+            } else {
+                customFormContainer.style.display = 'block';
+                expertFormContainer.style.display = 'none';
+                toggleButton.innerHTML = '<i class="bi bi-code-square"></i> Show Expert Mode';
+                if (activeFormInput) activeFormInput.value = 'custom';
+            }
+        });
+    }
+
+    if (document.readyState === 'loading') {
+        document.addEventListener('DOMContentLoaded', initExpertMode);
+    } else {
+        initExpertMode();
+    }
+
+    document.addEventListener('htmx:afterSwap', function(event) {
+        if (event.detail.target.id === 'service-form' || event.detail.target.classList.contains('crd-form')) {
+            initExpertMode();
+        }
+    });
+})();