I continued with the Who Dunnit slot reel. I made the design so it can be printed as a one part but it needs supports, or in two parts that are glued together. They're snug enough there shouldn't be any extra wobble even if the glued together version is printed.
The first attempt was almost perfect, the hub axle part was 2mm longer so the reel didn't go deep enough to trigger the home position opto switch.
This was fixed in the second version, which also seems to work fine in the game.
I created myself an account at Thingiverse (apzpins) where I'll start releasing the various parts I've done and that I'll make in the future. None of these parts are 1:1 clones, they're often reinforced or otherwise designed for ease of printing and durability in commercial use. My older stuff is made with OpenSCAD, the newer ones with FreeCAD.