3/8" minimalist spool holder for MendelMax

I loved the look of Amplivibe's spool holder, but I needed something that would accept R6ZZ bearings, since I had a bunch left over from my 3/8" Acme leadscrew. So, I modified the OpenSCAD file that Amplivibe graciously provided, and made the screw holes larger.

Untouched is the hole for the screw in the legs of the thing; I have plenty of metric screws lying around so I didn't bother messing with that.