Magnetic Effector 12mm/45mm E3D v6

While waiting for my new arms to arrive, I designed this. It's still awaiting print and testing, but I've been using a similar design with very good results.

Make sure you put your chosen carriages around and aligned with the magnet spaces, to eliminate any calibration issues with your printer.

Original Fusion 360 files are available at http://a360.co/2DDgF4b