RigidBot PLA Spool Holder

Prevent the RigidBot PLA spools from rocking back and forth during prints.

Similar to yzmoto66's spool holder but with significant mass reduced and nubs at the opposite end to keep the spool on the holder. At 20% fill, this holder is 44g and yzmoto66's holder is 106g.

The nubs on the first version I printed were too small. I increased the size here but haven't tested it. Let me know how it works out!

Also check out my newer 56mm Spool Holder which uses two halves instead of one giant piece to reduce mass.