My rock tumbler (THUMLER’s Model T No. 100) broke down when the lid wore through. This thing is a 3lb capacity beginner model I picked up on ebay.
Today I was able to make a lid for it (so if you need a lid for yours feel free to contact me).
I made a new lid out of some hard cutting board material on my CNC mill. I think these lids are better because they are thicker and are more robust material.
I did a run around the perimeter to make sure it was the same thickness as the original part on the edge. But the rest of the lid is thicker so it should last longer.