My old Ford 302 V8 needs new head gaskets, which means the heads have to come off, and to keep the pushrods from just rolling around the garage I decided to make a holder to keep them corraled. I'm too lazy to drill 16 holes in a wood block, so I designed this in TinkerCad and printed it on my AnkerMake M5C. It's just a rectangular block with 16 hollow cylinders in it. Designed for pushrods up to about 9.5mm in diameter - if you need a different size, you can scale it accordingly. I labeled the front using PrusaSlicer's new text feature so I could put the rods back in the same positions.

TinkerCad seems to have lost the design somehow, so I'm not able to share a link to it.