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I've done some re-shimming and the issue is improving. Now the only issue remaining is when I test fire in semi-auto the gun will seize half the times (can be released if go into auto). However, in full-auto this issue does not occur.
This semi-auto gearbox seizure issue does not happen if I put back the stock gears that's factory shimmed. So Im guessing some of my shimming is still not right...
Any idea on shimming which gear would likely resolve this issue?
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