Spool Ballast for AMS Rollers

Clips into filament reels to prevent them from slipping or skipping on the AMS rollers.
Great for near-empty reels and rigid filaments.

- Works with Bambu Lab and all equivalently sized filament reels.
-- For hub diameter 55mm and spool width 68mm with an internal rim (flange) on one side.
-- This version does not work with old or new Prusa filament reels; their hubs are a bit smaller and the internal rim is much thicker ... but I'm working on it.
- Uses up to seven AA batteries to provide the weight - the heaviest, most generic thing you're most likely to throw out.
- Battery assembly orientation is a reminder of charge status.
- Easy and secure battery and reel retaining mechanisms.
- Sits flush on plastic reels and near-flush on cardboard ones.
- Includes extra clip for reels with thicker internal rims (e.g., Elegoo's reinforced cardboard one).
- Also includes a quick-printing tester/gauge to see if it will fit into a particular reel.
- Assembles without fasteners.




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