Summary

There are plenty of counters like this on thingiverse. I use them to track obnoxious numbers of tokens or counters in Magic the Gathering - d10s are just too slow when Grolnok needs a half dozen chaining triggers to function in brackets 2 or 3.

After trying out several designs I've found here, none of them are exactly what I want, so I set out to combine the benefits of the two best ones I could find (see "Remixed From" below)

FChamberlain's design has great aesthetics, but I never had much success printing it without the bridging looking like garbage, so I never even got far enough to try out the locking system.

I love the adjustable friction in TheDuker's design, but the recessed letters printed a lot worse, and the rounded design didn't speak to me as much

My goals were:

• Easy to print (no supports, no bridging, transition point for color changes on single-material printers)
• The good aesthetics, at least from the front (from Fchamberlain's design)
• A screw to adjust friction on the disks (from TheDuker's design)
• <= 63mm wide, small enough to fit on a MTG card

Assembly:

• Figure out which spinners are the 10s and 1s digits by aligning them with the front panel
• Place the front panel face down with the spinners on the axles
• Place the back panel on top of the front and spinners
  • This is an area for improvement, there's no catch or anything to let you know you're lined up
• Screw the bolts into the front panel until you reach the desired resistance

You should be able to spin the recessed bolts with your fingernails, but if the threads are extra gloopy, you might need some needle nosed pliers to get past that

Fusion 360 files are attached, but they're a mess. The wheel is upside down, because the back started out as the front. And I wasn't sure how to copy it, so I made a whole separate project to create the 1s digit