The part that held the thumb wheel on my calipers broke and I needed a replacement. Could not find one to buy or print, so I designed this replacement with SketchUp 2018 and printed it on my Mk3 using Prusament Galaxy Silver at 0.1 mm layer height with supports. The part has worked well for years. Yes, I know that the dial is not oriented properly, but I once dropped the caliper and I can no longer get the dial to align correctly, yet it still works, just have to re-check the 0 alignment before using it.
The author marked this model as their own original creation.