Holder.scad is main file.
Uses ISOThread.scad to create very specialized M40.8 thread with 1.5mm pitch.
Near top of Holder.scad are 4 lines:
Uncomment body() to compile and render main body of holder.
Uncomment top() to compile and render top of holder.
Body containts print support break-outs in bag access slot, these will need to be broken out and cleaned up.
body_test() is debug, it produces just the outside thread of the body for my testing purposes.
top_test() is debug, it produces just the inside thread of the top for my testing purposes.