1 2 3 Block with threaded holes and connecting bolts

1 2 3 Block.

Bolt together using a method I've seen on a youtube video.

This is just a bit of fun, they are probably not that useful for anything. Maybe if you don't need super accurate tolerances. That said, they do connect up pretty tight and well aligned. The tolerances of the side ratios will of course depend on your printer.

*** NB I was holding off on publishing this to sort out the issues with the threads, and I just can't get them to work like I want to - they need some rethought and I did have an idea to try next but then I left it a week and I've forgotten what I was going to do… They still work as just blocks, and do screw together somewhat, so just to get this out of my drafts: here is v0.9! ***

I've found printing 5 walls and 4 top and bottom layers to give good strength. You will get a few dags from the very tops of the holes where they are a bridge, but they break off and work just fine.