I printed This on 0.2 layer height and 100% infill.
Filament used is transparent TPU (A82).
As added weight I used 3, 5mm magnetic balls (fidget toy). Overall it adds 3.30g.
It fits quite tightly so it wont fall of. But adding the balls is a bit complicated but if you get it right it stays quite tightly and it doesn't interfere with flipping.
The author marked this model as their own original creation.