Edit 2/14/17: part files have been updated. many small adjustments have been made to improve the quality of this puzzle. There is also a .zip file added that contains a set of alternate parts to create a fully proportional 3x3x5.
Video of it here showing solve. Last few minutes show some internals.
This is a 3x3x5 puzzle cube. You will need to provide your own core and screws/springs from another cube. I recommend using a YJ Guanlong core, as these can be found for $3-4 and this has been designed with that core.
Surfaces will need to be sanded smooth to allow best operation of the cube, and to allow the stickers to adhere properly to the sides. It takes some work to get this working properly.
I do extensive sanding to my puzzles, so I print at standard quality for speed.
This puzzle will require extensive sanding to get it working properly. If it's not turning well, you most likely need to sand more.
I use a combination of sandpapers from 180 grit on up to 1500 grit for my puzzles. It is a lot of work, but if you can still see printed lines, you haven't gone far enough.
I do all my work with Open Source software.
This puzzle was designed exclusively in Blender 3D.