Filawinder Thickness Gauge

Sandwich the filament between bearings and show the thickness.
Works Good Enough, there is some slop with how the gauge bearing is held in place, but it works. When the filament is pulling on it, it forces the setup into the same orientation, so its more consistent than you would think. Also the extra tension caused by the bearings makes the spool wind up nice and tight.

Drill a hole wherever needed for the hole to mount the thickness gauge.

I found that really securing the tube so the tu