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Track with additional rewind option for Multiple Mechanism Auto-Rewind Spool Holder

by FlamenG Jul 11, 2019
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I think this mod is really useful. One thing I did run into is that the spring is just held in by friction. Given that there is no "standard" spring, the pen springs I was using we over time falling out. I decided to put a dab of hot glue on my work surface and dipping the top of the spring in the glue before I inserted it. This has kept the springs in place without impacting performance.

I agree that finding the proper spring may be little bit challenging. Your solution is simple and functional.