Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5868127.

top mount with three 608 bearings makes this a smooth operator. 2 versions for your needs. Holds up to a 80mm wide spool

Modified the original to work with any printer for a top mount solution.

2 versions available depending on your needs

Holds the wide Hobbyking spools

Recommend 3 walls, and 25% infill