diff --git a/packages/open_vp_cal/src/open_vp_cal/led_wall_settings.py b/packages/open_vp_cal/src/open_vp_cal/led_wall_settings.py
index d46402f..6384f6b 100644
--- a/packages/open_vp_cal/src/open_vp_cal/led_wall_settings.py
+++ b/packages/open_vp_cal/src/open_vp_cal/led_wall_settings.py
@@ -81,20 +81,35 @@ class LedWallSettings(BaseModel):
     verification_wall: str = Field(default="")
 
     # ===== Runtime Fields (excluded from serialization) =====
-    processing_results: ProcessingResults = Field(
-        default_factory=ProcessingResults,
-        exclude=True
+    _processing_results: ProcessingResults = PrivateAttr(
+        default_factory=ProcessingResults
     )
-    separation_results: Optional[SeparationResults] = Field(
+    _separation_results: Optional[SeparationResults] = PrivateAttr(
         default=None,
-        exclude=True
     )
 
+    @property
+    def processing_results(self) -> ProcessingResults:
+        return self._processing_results
+
+    @processing_results.setter
+    def processing_results(self, value: ProcessingResults):
+        self.processing_results = value
+
+    @property
+    def separation_results(self) -> Optional[SeparationResults]:
+        return self._separation_results
+
+    @separation_results.setter
+    def separation_results(self, value: SeparationResults):
+        self._separation_results = value
+
     # ===== Private Attributes (not in schema at all) =====
     _sequence_loader: Optional[SequenceLoader] = PrivateAttr(default=None)
     _sequence_loader_class: type = PrivateAttr(default=SequenceLoader)
     _project_settings: Optional["ProjectSettings"] = PrivateAttr(default=None)
 
+
     @field_validator(
         "roi",
         mode="before",
diff --git a/packages/open_vp_cal/src/open_vp_cal/project_settings.py b/packages/open_vp_cal/src/open_vp_cal/project_settings.py
index 8f3c7c4..d9364c1 100644
--- a/packages/open_vp_cal/src/open_vp_cal/project_settings.py
+++ b/packages/open_vp_cal/src/open_vp_cal/project_settings.py
@@ -28,7 +28,6 @@
     field_validator,
     field_serializer,
     model_validator,
-    model_serializer,
     PrivateAttr,
     ConfigDict,
 )
@@ -128,16 +127,6 @@ def handle_nested_format(cls, data: Any) -> Any:
             return inner
         return data
 
-    @model_serializer(mode='wrap')
-    def serialize_nested(self, handler) -> dict:
-        """Output backwards-compatible nested JSON format."""
-        data = handler(self)
-        version = data.pop('openvp_cal_version', open_vp_cal.__version__)
-        return {
-            constants.OpenVPCalSettingsKeys.VERSION: version,
-            constants.OpenVPCalSettingsKeys.PROJECT_SETTINGS: data
-        }
-
     def __init__(self, led_wall_class: Optional[Type[LedWallSettings]] = None, **data):
         """Initialize a ProjectSettings object.