openGrid with Multiboard-compatible screw holes

openGrid tiles with threaded holes that are compatible with Multiboard small threads (see GIF). Why? Easily attach models using just printed screws Use screw-in Multiconnect points Create models cross-compatible with Multiboard, just by adding elongated holes to your designs I've included tiles 2x2 to 12x12, T-screws and Multiconnect points. Note : I drew these threads in CAD. They aren't exactly the same as the original Multiboard threads, but after some trial and error they work quite well and should be compatible.