designed for a 4 inch (100mm) thick headboard, mine is upholstered so you may need to put cloth or foam strips. hole is big enough for a mid thread bolt, that way you just screw it into a snap and it'll hold strong.

no supports. ribbed for her structural integrity under load. ive done like 0 optimization of the size and shape so it ends up blocking the back of 9 multiholes (interferes with ds snaps and rear bolt holes).

i used my 0.2 multiboard slicer profile and it ended up taking me 16 hours to print 4 of them on a prusa mk3s. 0.3 should be fine if you're less patient.