Shameful attempt to hack this into a solder spool holder

The library needed a little editing in order to render just the base.

I note that doing this from the grounds up probably would have been
easier, but I'm just really lazy.

Ref michaelgale#17

cqgridfinity/gf_box.py

@@ -337,6 +337,7 @@ def render_shell(self, as_solid=False):
             .translate((*self.half_dim, 0.5))
         )
         rc = rc.intersect(r).union(rw)
+        return rc
         if not as_solid:
             return rc.cut(self.interior_solid)
         return rc
@@ -479,3 +480,40 @@ class GridfinitySolidBox(GridfinityBox):
 
     def __init__(self, length_u, width_u, height_u, **kwargs):
         super().__init__(length_u, width_u, height_u, **kwargs, solid=True)
+
+
+box = GridfinityBox(
+    length_u=1,
+    width_u=1,
+    height_u=0,
+    holes = True,
+)
+b = box.render()
+
+wallT = 4
+bearingT = 7
+bearingOD = 22
+h = 62.5
+
+solderGuideID = 1.75
+solderGuideT = box.outer_rad - GR_TOL/2
+solderGuideL = GRU / 2 + solderGuideID / 2 + solderGuideID
+
+b = b.faces(">Z").workplane().tag("top").end()
+b = b.workplaneFromTagged("top").move(GRU / 2 - wallT / 2 - GR_TOL / 2,0).rect(wallT, GRU - 2 * box.outer_rad).extrude(h)
+b = b.faces(">Z").edges("|X").fillet(GRU / 3)
+b = b.faces("<X[2]").workplane(centerOption="CenterOfBoundBox").move(0, h / 2 - bearingOD / 2 - wallT).cylinder(bearingT, bearingOD / 2 + wallT)
+b = b.faces("<X[3]").workplane(centerOption="CenterOfBoundBox").hole(bearingOD)
+
+if solderGuideID != 0.0:
+    b = b.workplaneFromTagged("top").move((GRU - solderGuideL) / 2 - GR_TOL / 2, GRU / 2 - solderGuideT / 2 - GR_TOL / 2).rect(solderGuideL, solderGuideT).extrude(solderGuideID * 3)
+
+    b = (b.edges(">>Y and >>X").fillet(box.outer_rad))
+    b = b.faces(">Y").workplane(centerOption="CenterOfBoundBox").move(0,-(box.bin_height + GR_BASE_CLR) / 2).hole(solderGuideID)
+
+    b = (b.faces("<X[2]").edges("<<Z").fillet(wallT / 2))
+    b = (b.faces("<Y[2]").edges("<<Z").fillet(wallT / 2))
+    b = (b.faces("<Z[1]").edges("<X").fillet(solderGuideID))
+    b = (b.faces("<Z[1]").edges(">Y").fillet(solderGuideID))
+
+show_object(b)