Universal no friction spool holder for Cel Robox

As always:
Remix of the EXCELLENT https://www.youmagine.com/designs/um2go-um2-low-friction-spool-holder
Need :
2 x 608 bearings
1 x M8 threaded rod x 77mm
2 x M8 nut (better with 1 nylon stop and 1 std)
1 x 8,50 mm washer
left and right element available with non centered hole (to avoid spool touch the printer)