This is a universal spool holder.
For assembling this support you have to buy this pieces:
- Screw M4 x 25 (UNI 7689)
- Self-locking nut M4
The two files that I published are the same and they haven't flaws.
In the version 3 (v3) I have only changed a measure of 0.1mm.
The file that you see printed in the photos is the version 2 (supp.bobina_cuscinetti_v2.stl).