TYCO Rebound Parametric hex wheel adaptor 12mm

Having reviewed the comments and remixes of other adapters, I decided to build a new one from scratch that is parametric and stronger.

This adapter is designed for the 4 spline axle. The tolerances give a very strong friction fit and allow the axle to be beefed up.

I printed in PETG and it is very strong. Nylon would also be a good choice.