This thing is awesome! Thanks a lot. I've made a couple and am putting my nephews Christmas present in them (money).
I printed it on the new MOD-t in PLA. 0.2 layer, 0.8 shell, 0.8 top/bottom, 10% infill. I had to scale the bottom part in order for them to fit together. I scaled 98% and they slide together wonderfully! Thanks again!