diff --git a/src/servala/core/crd.py b/src/servala/core/crd.py
index aebb99f..e414168 100644
--- a/src/servala/core/crd.py
+++ b/src/servala/core/crd.py
@@ -292,8 +292,9 @@ class FormGeneratorMixin:
 
         if "context" in self.fields:
             self.fields["context"].widget = forms.HiddenInput()
-            if "context" in self.initial:
-                self.fields["context"].queryset = ControlPlaneCRD.objects.filter(pk=self.initial["context"].pk)
+            if crd := self.initial.get("context"):
+                crd = getattr(crd, "pk", crd)  # can be int or object
+                self.fields["context"].queryset = ControlPlaneCRD.objects.filter(pk=crd)
 
         if self.instance and hasattr(self.instance, "name") and self.instance.name:
             if "name" in self.fields:
diff --git a/src/servala/core/models/service.py b/src/servala/core/models/service.py
index 280c780..1535703 100644
--- a/src/servala/core/models/service.py
+++ b/src/servala/core/models/service.py
@@ -891,7 +891,6 @@ class ServiceInstance(ServalaModelMixin, models.Model):
             return
         return self.context.django_model(
             name=self.name,
-            organization=self.organization,
             context=self.context,
             spec=self.spec,
             # We pass -1 as ID in order to make it clear that a) this object exists (remotely),
diff --git a/src/servala/frontend/templates/frontend/organizations/service_offering_detail.html b/src/servala/frontend/templates/frontend/organizations/service_offering_detail.html
index 3305328..53e32d2 100644
--- a/src/servala/frontend/templates/frontend/organizations/service_offering_detail.html
+++ b/src/servala/frontend/templates/frontend/organizations/service_offering_detail.html
@@ -17,7 +17,7 @@
 {% endif %}
 {% endpartialdef %}
 {% partialdef service-form %}
-{% if service_form %}
+{% if service_form or custom_service_form %}
     <div class="card">
         <div class="card-header d-flex align-items-center"></div>
         <div class="card-body">
@@ -26,7 +26,7 @@
                     {% translate "Oops! Something went wrong with the service form generation. Please try again later." %}
                 </div>
             {% else %}
-                {% include "includes/tabbed_fieldset_form.html" with form=service_form %}
+                {% include "includes/tabbed_fieldset_form.html" with form=custom_service_form expert_form=service_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 744df5f..41f1af2 100644
--- a/src/servala/frontend/templates/includes/tabbed_fieldset_form.html
+++ b/src/servala/frontend/templates/includes/tabbed_fieldset_form.html
@@ -16,6 +16,7 @@
         </div>
     {% endif %}
     <div id="custom-form-container" class="{% if form %}custom-crd-form{% else %}expert-crd-form{% endif %}">
+        {% if form and form.context %}{{ form.context }}{% endif %}
         {% if form and form.get_fieldsets|length == 1 %}
             {# Single fieldset - render without tabs #}
             {% for fieldset in form.get_fieldsets %}
@@ -131,13 +132,10 @@
         <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 %}
-                {{ form_submit_label }}
-            {% else %}
-                {% translate "Save" %}
-            {% endif %}
-        </button>
+        <input class="btn btn-primary me-1 mb-1" type="submit"
+            {% if form and expert_form %}formnovalidate {% endif %} {# browser form validation fails when there are fields missing/invalid that are hidden #}
+            value="{% if form_submit_label %}{{ form_submit_label }}{% else %}{% translate "Save" %}{% endif %}"
+        >
     </div>
 </form>
 {% if form %}
diff --git a/src/servala/frontend/views/service.py b/src/servala/frontend/views/service.py
index 52b0c71..2c6923e 100644
--- a/src/servala/frontend/views/service.py
+++ b/src/servala/frontend/views/service.py
@@ -123,7 +123,7 @@ class ServiceOfferingDetailView(OrganizationViewMixin, HtmxViewMixin, DetailView
     def context_object(self):
         if self.request.method == "POST":
             return ControlPlaneCRD.objects.filter(
-                pk=self.request.POST.get("context"),
+                pk=self.request.POST.get("expert-context", self.request.POST.get("custom-context")),
                 # Make sure we don’t use a malicious ID
                 control_plane__in=self.planes,
             ).first()
@@ -131,37 +131,49 @@ class ServiceOfferingDetailView(OrganizationViewMixin, HtmxViewMixin, DetailView
             control_plane=self.selected_plane, service_offering=self.object
         ).first()
 
-    def get_instance_form(self):
-        if not self.context_object or not self.context_object.model_form_class:
-            return None
 
-        initial = {
+    def get_instance_form_kwargs(self, ignore_data=False):
+        return {"initial": {
             "organization": self.request.organization,
             "context": self.context_object,
-        }
+            }, "prefix": "expert", "data": self.request.POST if (self.request.method == "POST" and not ignore_data) else None
+                  }
 
-        # Pre-populate FQDN field if it exists and control plane has wildcard DNS
-        form_class = self.context_object.model_form_class
-        if (
-            "spec.parameters.service.fqdn" in form_class.base_fields
-            and self.context_object.control_plane.wildcard_dns
-        ):
-            # Generate initial FQDN: instancename-namespace.wildcard_dns
-            # We'll set a placeholder that JavaScript will replace dynamically
-            initial["spec.parameters.service.fqdn"] = ""
+    def get_instance_form(self, ignore_data=False):
+        if not self.context_object or not self.context_object.model_form_class:
+            return
 
-        return form_class(
-            data=self.request.POST if self.request.method == "POST" else None,
-            initial=initial,
-        )
+        return self.context_object.model_form_class(**self.get_instance_form_kwargs(ignore_data=ignore_data))
+
+    def get_custom_instance_form(self, ignore_data=False):
+        if not self.context_object or not self.context_object.custom_model_form_class:
+            return
+        kwargs = self.get_instance_form_kwargs(ignore_data=ignore_data)
+        kwargs["prefix"] = "custom"
+        return self.context_object.custom_model_form_class(**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 get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
         context["select_form"] = self.select_form
         context["has_control_planes"] = self.planes.exists()
         context["selected_plane"] = self.selected_plane
-        context["service_form"] = self.get_instance_form()
-        # Pass data for dynamic FQDN generation
+        if self.request.method == "POST":
+            if self.is_custom_form:
+                context["service_form"] = self.get_instance_form(ignore_data=True)
+                context["custom_service_form"] = self.get_custom_instance_form()
+            else:
+                context["service_form"] = self.get_instance_form()
+                context["custom_service_form"] = self.get_custom_instance_form(ignore_data=True)
+        else:
+            context["service_form"] = self.get_instance_form()
+            context["custom_service_form"] = self.get_custom_instance_form()
+
         if self.selected_plane and self.selected_plane.wildcard_dns:
             context["wildcard_dns"] = self.selected_plane.wildcard_dns
             context["organization_namespace"] = self.request.organization.namespace
@@ -175,7 +187,10 @@ class ServiceOfferingDetailView(OrganizationViewMixin, HtmxViewMixin, DetailView
             context["form_error"] = True
             return self.render_to_response(context)
 
-        form = self.get_instance_form()
+        if self.is_custom_form:
+            form = self.get_custom_instance_form()
+        else:
+            form = self.get_instance_form()
         if not form:  # Should not happen if context_object is valid, but as a safeguard
             messages.error(
                 self.request,
@@ -203,8 +218,6 @@ class ServiceOfferingDetailView(OrganizationViewMixin, HtmxViewMixin, DetailView
                 )
                 form.add_error(None, error_message)
 
-        # If the form is not valid or if the service creation failed, we render it again
-        context["service_form"] = form
         return self.render_to_response(context)