diff --git a/.obsidian/plugins/recent-files-obsidian/data.json b/.obsidian/plugins/recent-files-obsidian/data.json
index 94f5e1e..800abf7 100644
--- a/.obsidian/plugins/recent-files-obsidian/data.json
+++ b/.obsidian/plugins/recent-files-obsidian/data.json
@@ -1,8 +1,32 @@
 {
   "recentFiles": [
     {
-      "basename": "pre-takeoff-confirmation",
-      "path": "pre-takeoff-confirmation.md"
+      "basename": "automating-pdf-annotation",
+      "path": "automating-pdf-annotation.md"
+    },
+    {
+      "basename": "automating-estimating-project-creation",
+      "path": "automating-estimating-project-creation.md"
+    },
+    {
+      "basename": "automating-email",
+      "path": "automating-email.md"
+    },
+    {
+      "basename": "assembly-philosophy",
+      "path": "assembly-philosophy.md"
+    },
+    {
+      "basename": "assembly-objects",
+      "path": "assembly-objects.md"
+    },
+    {
+      "basename": "breakdown-objects",
+      "path": "breakdown-objects.md"
+    },
+    {
+      "basename": "feeders",
+      "path": "feeders.md"
     },
     {
       "basename": "full-takeoff",
@@ -12,6 +36,10 @@
       "basename": "README",
       "path": "README.md"
     },
+    {
+      "basename": "pre-takeoff-confirmation",
+      "path": "pre-takeoff-confirmation.md"
+    },
     {
       "basename": "breakdowns",
       "path": "breakdowns.md"
@@ -20,30 +48,10 @@
       "basename": "subfeeds",
       "path": "subfeeds.md"
     },
-    {
-      "basename": "assembly-philosophy",
-      "path": "assembly-philosophy.md"
-    },
-    {
-      "basename": "automating-pdf-annotation",
-      "path": "automating-pdf-annotation.md"
-    },
-    {
-      "basename": "automating-estimating-project-creation",
-      "path": "automating-estimating-project-creation.md"
-    },
     {
       "basename": "project-setup",
       "path": "project-setup.md"
     },
-    {
-      "basename": "breakdown-objects",
-      "path": "breakdown-objects.md"
-    },
-    {
-      "basename": "assembly-objects",
-      "path": "assembly-objects.md"
-    },
     {
       "basename": "2025-07-18_estimating-isnt-engineering",
       "path": "2025-07-18_estimating-isnt-engineering.md"
@@ -108,10 +116,6 @@
       "basename": "area-of-refuge",
       "path": "area-of-refuge.md"
     },
-    {
-      "basename": "feeders",
-      "path": "feeders.md"
-    },
     {
       "basename": "lightning-protection",
       "path": "lightning-protection.md"
diff --git a/assembly-objects.md b/assembly-objects.md
index 1be18f0..1ec73e1 100644
--- a/assembly-objects.md
+++ b/assembly-objects.md
@@ -10,19 +10,33 @@ tags:
 # Assembly Objects
 
 ```cs
-public class GangableReceptacle : IGangableDevice
-...
+public class GangableReceptacle : IGangableDevice, IUtilizationEquipment
+{
+    public int Gangs { get; }
+    
+    ...
+}
 
 public class GangableSwitch : IGangableDevice
 ...
 
-public class OutletBox
+public class DeviceBox : IOutletBox
 {
-    public List<IUtilizationEquipment> Contents;
+    private List<IGangableDevice> _contents;
 
-    public void Add(IUtilizationEquipment)
+    public void Add(IGangableDevice device)
     {
-        // Add to contents or throw if incompatible
+        _contents.Add(device);
+    }
+    
+    public int GetGangs()
+    {
+        int gangs = 0;
+        foreach (device in _contents)
+        {
+            gangs += device.Gangs
+        }
+        return gangs
     }
 
     public List<Item> Resolve()
@@ -43,9 +57,15 @@ public class OutletBox
 - type: transfer-switch
   parents: 2
   children: 1
+  primary-rating: amperes
 
 - type: transformer
   parents: 1
-  children: 1
+  children: 1..
   primary-rating: volt-amperes
+  
+- type: generator
+  parents: 0
+  children: 1..
+  primary-rating: watts
 ```
diff --git a/automating-pdf-annotation.md b/automating-pdf-annotation.md
index d75df7e..6932a85 100644
--- a/automating-pdf-annotation.md
+++ b/automating-pdf-annotation.md
@@ -10,7 +10,29 @@ tags:
 
 See [[portable-tools]] for valid dependencies.
 
-## Bluebeam Revu Measure Hack
+## Clean Documents
+
+### Page Rotation
+
+Pages have a rotation value independent of appearance
+which rotates the drawing reference grid.
+This must be resolved before further processing.
+
+Trivial coordinate-returning tools/functions
+may use the non-rotation-adjusted values,
+which are essentially useless for our purposes.
+
+MuPDF and similar libraries provide functions
+to return the "visual" (read _correct_) coordinates,
+but it would be ideal to redraw content with the correct orientation.
+
+## Extract Bluebeam Markups
+
+Right now I'm exporting Bluebeam markups to csv before processing,
+however if I converted to the code to extract the markups directly with MuPDF.Net
+as I've managed before with itext, that could save a step.
+
+### Bluebeam Revu Measure Hack
 
 BlueBeam Revu give coordinates for count annotations,
 even where count = 1.
@@ -37,20 +59,6 @@ Bluebeam's .bax is a annotation interchange format based on xml
     > [!menu]
     > Markups List > Markups > Import
 
-## Clean Documents
-
-### Page Rotation
-
-Pages have a rotation value independent of appearance
-which rotates the reference grid.
-This must be resolved before further processing.
-
-## Extract Bluebeam Markups
-
-Right now I'm exporting Bluebeam markups to csv before processing,
-however if I converted to the code to extract the markups directly with MuPDF.Net
-as I've managed before with itext, that could save a step.
-
 ## PDF Content Positional Tokenization
 
 Recursively parse and consume pdf vector content.
diff --git a/breakdown-objects.md b/breakdown-objects.md
index 2b20d16..1c47e25 100644
--- a/breakdown-objects.md
+++ b/breakdown-objects.md
@@ -22,9 +22,19 @@ Buildings["Building A"].GetHeight()
 ``` 
 
 ```
+Buildings["Building A"].GetLevels()[0]
 Buildings["Building A"].Levels[0]
 ```
 
+For jobs with only one building:
+
+```
+Building = Buildings["Main Building"]
+Building.Levels[0]
+```
+
+## Pathfinding
+
 Define equipment locations stochastically
 
 ```
diff --git a/feeders.md b/feeders.md
index 6cacf72..a4b9398 100644
--- a/feeders.md
+++ b/feeders.md
@@ -43,7 +43,7 @@ All feeder takeoff descriptions should be prefixed with `<parent> TO <child>`
 
 > [!cite] Joel Jansen, in reference to Omni Hotels Raleigh, pp.
 > It is acceptable to use typicals for identical feeders
-> so long as the typical is in the Feeders `Area`
+> so long as the typical is in the Feeders `Area`.
 
 ## Sequence