Keep you puzzle box upright with this puzzle stand.

The bottom part is hollow so that it can be filled with sand (or whatever you like) to make it sturdier.

I made a 18mm wide hole at 82mm from the bottom. Paus the print at that height and use a funnel to fill the hollow space with dry and clean sand, then resume the print. You can't wait any further because after that layer the hole is filled up and there is no way to add or remove sand.

WARNING: Sand can damage your printer. To reduce risk, don't fill all the way up. Print at own risk