Spool Hub for spools with >= 50mm center

This is my 3rd spool hub design and is much easier for changing spools (design 2 didn't cut the mustard). Simply slide the spool on and off the holder, that's it. It has a slight ridge on either end to stop the spool falling off and a housing on either end for a 608 bearing. It allows for spools up to 80mm in width and the hub has a total diameter of 48mm so spools with center holes 50mm and greater are suitable.

Designed in 2 pieces to allow for easy printing and low filament usage, no su