Spool holder for RoboxPRO

This is a spool holder for third party spools to suit the new CEL RoboxPRO printer. At the time of writing there aren't many users but hopefully this will be useful to someone in the future.

This has an offset between Ext.1 and Ext.2 to give clearance between the spools. The centre section is a rotating collar that is currently sized for spools with a 50mm bore but this could be adapted for other sizes.

The assembly of the main Smartreel adaptor and the shaft does require a spot of glue to hold it in place but it is then solid and works very well. The the collar just slides onto the shaft and the threaded nut holds it and the filament spool in place.