Clip on 4020 spool holder for 628 ( 8/24/8 - Skate ) bearings and a second version for 609 bearings ( 9/24/7 )
Printed in Pla just clips onto the Aluminium extrusion, held together by two M3x20 screws.
V1.1 Improved clip and added single / set files for the 609 Version