HAPE Quadrilla straight line hole dimension 180 mm

thingiverse

The 180 mm hole dimension, measured at its center, is specifically designed to accommodate short lines. It seamlessly integrates into the roundabout and diagonally into the printer's design. I built this project for my kids' entertainment. I recently updated the design by adding a small brick element that can be printed twice and securely attached using superglue. In an earlier update, I addressed some issues with the initial design. The marbles were experiencing unwanted jumps when the flat fillings for the holes were present. To rectify this problem, I introduced a slight bevel into the middle area where the marbles roll. For those interested in creating their own HAPE Quadrilla marble runs, I've established a group on Thingiverse: https://www.thingiverse.com/groups/hape-quadrilla-marble-run I hope you and your family have a blast using this design.