Creality K1 / K1C / K1 Max Spool Roller

Updated on 11/26/23: Added more support where the bottom of the roller tray meets the coupling. I also modified the nipple on the roller and the Square Key Peg to be a little more snug. I recently got a K1 to replace my E3P. I wanted to replace the spool holder with a rolling one, but didn't like some of the options available. I designed this new roller, taking some ideas from the roller I designed for the E3P, with the main focus on functionality and strength. The roller has a nipple on