diff --git a/capellambse_context_diagrams/__init__.py b/capellambse_context_diagrams/__init__.py
index c5fa031..460c356 100644
--- a/capellambse_context_diagrams/__init__.py
+++ b/capellambse_context_diagrams/__init__.py
@@ -254,10 +254,7 @@ def register_physical_port_context() -> None:
     m.set_accessor(
         cs.PhysicalPort,
         ATTR_NAME,
-        context.PhysicalPortContextAccessor(
-            DiagramType.PAB.value,
-            {},
-        ),
+        context.PhysicalPortContextAccessor(DiagramType.PAB.value, {}),
     )
 
 
diff --git a/capellambse_context_diagrams/collectors/custom.py b/capellambse_context_diagrams/collectors/custom.py
index 273e3ba..ffbc576 100644
--- a/capellambse_context_diagrams/collectors/custom.py
+++ b/capellambse_context_diagrams/collectors/custom.py
@@ -31,7 +31,7 @@ class CustomCollector:
 
     def __init__(
         self,
-        diagram: context.ContextDiagram,
+        diagram: context.CustomDiagram,
         params: dict[str, t.Any],
     ) -> None:
         self.diagram = diagram
@@ -89,9 +89,7 @@ def __call__(self) -> _elkjs.ELKInputData:
                 and getattr(current, "owner", None) is not None
                 and not isinstance(current.owner, generic.PackageTypes)
             ):
-                current = self._make_owner_box(
-                    current,
-                )
+                current = self._make_owner_box(current)
                 self.common_owners.discard(current.uuid)
             for edge_uuid, box_uuid in self.edge_owners.items():
                 if box := self.boxes.get(box_uuid):
@@ -288,7 +286,6 @@ def _make_edge_and_ports(
             ),
         )
         self.edges[edge_obj.uuid] = edge
-
         return edge
 
     def _need_switch(
diff --git a/capellambse_context_diagrams/context.py b/capellambse_context_diagrams/context.py
index d6225da..752d7cd 100644
--- a/capellambse_context_diagrams/context.py
+++ b/capellambse_context_diagrams/context.py
@@ -892,14 +892,6 @@ class CustomDiagram(ContextDiagram):
     """An automatically generated CustomDiagram Diagram."""
 
     _collect: dict[str, t.Any]
-    _display_symbols_as_boxes: bool
-    _display_parent_relation: bool
-    _hide_direct_children: bool
-    _slim_center_box: bool
-    _display_port_labels: bool
-    _port_label_position: str
-    _transparent_background: bool
-    _display_unused_ports: bool
     _unify_edge_direction: str
 
     def __init__(
@@ -912,14 +904,7 @@ def __init__(
     ) -> None:
         default_render_parameters = {
             "collect": {},
-            "display_symbols_as_boxes": False,
-            "display_parent_relation": False,
-            "hide_direct_children": False,
             "slim_center_box": False,
-            "display_port_labels": False,
-            "port_label_position": _elkjs.PORT_LABEL_POSITION.OUTSIDE.name,
-            "transparent_background": False,
-            "display_unused_ports": False,
             "unify_edge_direction": str,
         } | default_render_parameters
         super().__init__(
@@ -931,7 +916,7 @@ def __init__(
         self.collector = custom.collector
 
 
-class PhysicalPortContextDiagram(ContextDiagram):
+class PhysicalPortContextDiagram(CustomDiagram):
     """An automatically generated Context Diagram exclusively for
     PhysicalPorts.
     """