Wire spool under-shelf hanger

Too many projects and supplies; too little space! I threw together this simple hanger for wire spools in FreeCAD this morning to try to free up a tool box that really wasn't suited to storing wire spools anyway.

Print instructions

I also set 3 perimeters instead of Prusa's default 2 and 35% overlap between infill and perimeters (vs 25%) because top layers on the first print looked like they weren't quite meshing. Not sure if that's a resolution or a PETG issue. With no supports and these thick layers, the screw holes filled in a bit, but not so much that I needed to do any drilling. They are nominally 9/64" (3.57mm) to clear a #6 wood screw and 24mm apart. (What can I say... FreeCAD likes metric; the local hardware stores like Imperial.)

I picked PETG because I figured the slight springiness vs. PLA would come in useful if I bumped it, but I didn't really need much strength just to hold a couple wire spools.