This is version 2 of this twisty puzzle. The first version you can see here: https://www.youtube.com/watch?v=A_uMRyijAbg The new version is with improved tolerances so it is not that squishy. Printing instructions: Orient one of the triangle faces flat on the bed and use snap-off support. The triangles will be covered with stickers and the mechanism will not be affected. Assembly instructions: Screw 5 internal centers into the core with 3x20 wood screws( I cut their tips so they become 17 mm). I cut about 2/5-th of a curvy copter spring so it can fit in the piece. Use 5 edge pieces and 4 external center pieces and fit them between the internal centers. You will be left with a hole where the "last piece" can be fitted. Its a modified external center with smaller lips so it does not create to much pressure on the screws.