Bondtech Extruder Retraction Disk

This is for the Bondtech extruder, seriously the best extruder system in production. I have it connected to a bowden tube for my Kossel printer, and with very fast retractions the push fitting where the tube connects to the extruder was bouncing around quite a bit. Print this and slip it in that gap, and have fun with 70mm/s retractions!