Adaptor to mount Primaselect PVA+ spools on a shaft of your choosing. Might work for other Primaselect spools as well, since I don't have any, I can't say. Included and on the pictures is the 10 mm version. I am using this right now to remix a dry box design for 2 spools (see this).

I have included the .f3d file with 5 parameters to change diameter of the spool, the shaft and the distance for the clips to fit with Fusion360 (see picture). Don't forget to include tolerances.

For non-fusion360 user there is the .step file to adjust the model…

Get Prusament Version here.