Spool holder for taulman 645 spool, this has a 19 mm diameter hole with a 70 mm depth, this spool holder will comfortably hold the spool, while allowing easy access and replacement of spool.
Based on all spool models including the ones that come with my unit, I rounded some of the corners on the insert section for ease of placement for the holder itself.
There is a method of retention, it is sufficient but small.
This was designed in Fusion360, slapped together real quick.
It is best printed on its side with supports, I printed mine @ 100 microns, but you can go up to 200 imo.