Super-Simple Additional Spoolholder

Yet another spool-holder!
Here's a super-simple additional spool-holder for spools with a small diameter hole like Taulman Bridge :
2x Fender washers with 1/4" dia hole
2x Nuts 1/4" (one nut could be a unicorn-nut to pretty-up the end, if you like)
1x Piece of 3/8" OD x 1/4" ID Aluminum tube or similar
1x Piece of 1/4" threaded steel rod
1x Standard 1/4" Flatwasher

Just drill a 1/4" hole in the side of the Robo 3D and assemble.

 

Nice. If you remove the tube and print a pair of spool hubs with 608z bearings inserted into their centers it'll be even better.

My original spool holder was done like yours with an outer tube but it was still too much resistance. Hubs with bearings are awesome.