Link to the files required... https://www.thingiverse.com/thing:2905419Sooooo tempted
If your stuck for ideas of what you can make with a 3d printer...
+10bhp each those:
Well i have found a reasn for @chunkolini to buy a 3d printer
Ths would be perfect for one of his "bikes"
https://www.thingiverse.com/thing:950452