Cobblebot Little Monster Spool Holder

I designed this Spool holder for my Cobblebot Little Monster 3D Printer. It uses a 1/2"x12" threaded rod, four nuts and four washers in addition to using four of the M3 x 10 and M3 T nuts. It mounts to the 8020 extrusion. You need print two of the clamp parts. Place one of the nuts and washers on the threaded rod, then one of the clamp parts, the filament spool, then the other clamp part with the washer and then nut. You can adjust it to the tension you desire so the spool will easily turn on th