HSW countersunk + empty insert with hole trick

Combines a countersunk insert (to screw to the wall) and empty insert (to attach stuff) into one, so you don't waste space. Remixed from roryshko's model: Used the stepped hole trick so it can be printed without supports Added 2x and 4x versions, with one countersunk-empty and others empty (if you need other configurations, lmk in comments) Settings No supports Print with 0.3 mm or lower layer height Print upside down (files are already in correct print orientation)