So, I've managed to complete the test fit model so that I can appropriately arrange the guts of this thing.
Why yes, that is Blender's ambient occlusion render setting yous see. I could have modeled this in solidworks, but that would have been no fun at all. I need to model all the components that go inside and get to test fitting them.
Once the interior is complete I can move on to the wiring harness for linear motion followed closely by the heated bed and temperature control (fans!).