Drop in replacement for one of the rollers on the “Auto-Rewind Spool Holder for RepRack” (found here). Allows mounting respooler from the 8-Track project (which is smaller version of Filamentalist). Though in order to actually use it on a RepRack you need to use the original frame and tensioner (here). The new one unfortunately interferes with the pipe of the RepRack.
In addition to parts needed for the original rewinder and for the 8-track respooler, you'll need the following for this sled:
The author remixed this model.
Replaces roller with a sled to hold 8-track respooler.