Spool Holder for Sylvian42's Trinus Spool Mounts

This is a spool holder for the "Very Strong Trinus Spool Holder" designed by Sylvian42.
This one will hold multiple spool sizes, and has adjustable tension.

It needs two of each part, four skateboard bearings (like the ones everyone uses to make fidget spinners) a long 3/8 bolt, two 3/8 nuts, and a few washers.

To assemble, first press the bearings into each side of the two cones. It's a tight fit, but you should be able to do it by hand. Then insert the bolt into one of the tubes so th