ER20 Collet Rack wall mout or 3035-lite T slot rail.

This is an ER20 collet rack. Wall mount, or T-slot rail with 1.5" spacing, using 5/16 diameter screws.

The upper screw holes are accessed from inside the upper left and right collet sockets.  Use supports and a raft at your discretion.  I tried to design it so that a minimum amount of supports would be necessary.