Piston KEY RING (wrist pin wire lock)

Piston KEY RING (wrist pin wire lock)

thingiverse

After extensive use the original wrist pin would fall out. Added a wire lock to retain the wrist pin. I found I had to use the thinner wire lock with PLA, however PLA+ had no issue with either size. I may have also been aggressive when shoving it in. I'd recommend printing a spare. They print quickly, they're tiny. I used havenoname's updated piston.

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