I apologize in advance for the lack of continuity; but with all the information from so many people its hard to keep my thought processes easy to follow...

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ORIGINAL: gi1mo2
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Also check to see if the spacing between motor pinion and the main gear is even all around. The sound is not even from the motor as the main gear makes one turn.
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Yeah, so i checked the spacing, and it isn't even all around. I noticed that sound, too, but thought it was all part of the same problem. Anyway, that means of the three gear & shaft parts i have, all of them are warped. Each one also seems to have quite a bit of wobble on each end of the shaft... Is there any easy way to fix the spacing? Could it be a sign something is screwed up, or should i just keep replacing gears until i get a good one?
I ran my helicopter at various speeds without my blades (just my flybar & paddles) and it seemed to be alright. There were slight vibrations and a very small range of throttle, but it seemed insignificant.
I'll probably get some digital vernier calipers and double check, though, cause i'll use them in my school's machine shop too probably.
Next step is balancing my blades on the wine glasses

looks a lot cheaper and quicker than ordering a scale offline, hah.
After that, ill put them on and check tracking, and also run my helicopter at a higher speed to see if the vibrations go away...
And jeff, thanks for the pictures and videos, they helped conceptualize everything pretty well. Also, the new controllers and their lack of interference are incredible. I can't even fly my airplane here because of all the interference