esun spool spacer for filament refill

thingiverse

I purchased some PETG refills (filament without spool) from esun and attempted to use them with the spools leftover from previous PETG orders (regular filament on a spool). However, I found that the cardboard spool was too wide to fit, being crushed when spool bolts were tightened. Hence, I've made a spacer to be bolted in-between the spool halves, such that the cardboard roll can spin freely.