Summary I kept breaking tabs on the spool holder so I made a couple of modifications to the one 753630. I made the hole smaller and thicker to fit and ride the spool holder better. I added braces to the tabs to stop them from breaking off. I made the outer ring twice as thick to make it more beefy. I am going to make a left and right side one, because the M3D spools have a slightly bigger hole on one side. This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/hC6UOCZNTeW