diff --git a/fan_control_box.py b/fan_control_box.py
index 57d6a11..bbcd478 100644
--- a/fan_control_box.py
+++ b/fan_control_box.py
@@ -16,9 +16,6 @@ Workplane.addSvgPath = addSvgPath
 
 screw_simple = False  # Controls whether to not actually make the screw threads, saves time running it for testing
 
-pole_height = 24.5
-pole_dist = 10
-
 screw_length = 10  # FIXME need different ones for different holes
 top_screw = ButtonHeadScrew(
     size="M3-0.5",
@@ -63,16 +60,46 @@ box_height = 115 + wall_thickness
 box_width = 157 + wall_thickness
 box_thickness = 25
 
+pole_height = box_thickness - 2
+pole_dist = 10
+
 lower_box = Workplane()
 
 
+def make_component_holder_line(
+    result,
+    pole_height,
+    line_x_dist,
+    line_y_dist,
+    x_offset=0,
+    y_offset=0,
+):
+    return (
+        result.workplane(offset=(pole_height / 2) - wall_thickness)
+        .move(x_offset, y_offset)
+        .line(
+            line_x_dist,
+            line_y_dist,
+        )
+        .vertices()
+        .cylinder(pole_height, 3)
+        .workplane(offset=(pole_height - wall_thickness + 1.5))
+        .move(x_offset, y_offset)
+        .line(
+            line_x_dist,
+            line_y_dist,
+        )
+        .vertices()
+        .threadedHole(top_screw, pole_height * 0.4, simple=screw_simple)
+    )
+
+
 def make_component_holder(
     result,
     pole_dist,
     pole_height,
     box_width,
     box_height,
-    wall_thickness,
     x_offset=0,
     y_offset=0,
 ):
@@ -113,13 +140,20 @@ lower_box = make_component_holder(
     pole_height,
     box_width,
     box_height,
-    wall_thickness,
 )
 
 lower_box = make_component_holder(
-    lower_box, pole_dist, 10, 50, 30, wall_thickness, x_offset=10, y_offset=15
+    lower_box,
+    pole_dist,
+    10,
+    breadboard_width,
+    breadboard_height,
+    x_offset=0,
+    y_offset=50,
 )
 
+lower_box = make_component_holder_line(lower_box, 8, 0, 15, x_offset=0, y_offset=0)
+
 cq.exporters.export(lower_box, "/home/deck/model_files/fan_control_box_lower.step")
 
 try: