I designed a Rummikub case to store the pieces. I designed the tray to hold the pieces during gameplay. Tested by a 5-year old to check if a child can take out a pieces out of the tray during gameplay.

A simple battery holder insert for original Mitutoyo Calipers Case with 5x2 magnets to hold the SR44 (optional LR44) batteries in place. The insert has a tight fit into the case. The print pauses to insert the magnets.

I modeled this part after the original coffee beans container on the cm70. The plastic on the original part was brittle after few years. I added brass inserts (m3x5x4) to where the original screws connected. The original interface part is still required for this part to function. I user shortened m3x10 screws as I did not have any washers around :) Used the delivered support for PLA material for interfaces. Long story short: My wife is happy, I am happy.