Flexible, adjustable spool holder

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:3331712.

Required pieces:

2x 8mm drylin bearings https://www.amazon.com/gp/product/B06XPRCMJS

Print the main piece in TPU, the bearing spacer in whichever material you'd like. Insert one bearing, then the spacer, then the other bearing. Use the stopper to apply friction on the spool so it doesn't unroll while printing.