Ya'll know more about this, and I'm enjoying reading this. I'm just going to relay a recent experience.

My bow was shooting awesome. Beautiful arrow flight, the whole enchilada. Then one day I noticed my arrow "wiggling" a little in flight. Assuming I was doing something different, I didn't pay much attention to it. 4 days later the wiggle was still there, and worse. OK, time to look into this. Centershot was still good, arrow was still level......There was nothing visible that I could see causing it.

Off to the shop for some paper tuning. First shot yielded a 3" right tear. No lie. I'm scratching my head......Huh?? I tried adjusting my draw weight, different point weights.....Checked arrow straightness (i'm shooting aluminum).....nothing made any difference. So, I moved my rest to the right......no better. The only way I could get a good tear was to move the rest WAY to the left, opposite of what I should have done. Finally got a good tear, but.....I was SOOOOO far out of center there's no way I'm shooting this way. So I put it back in center, 3" right tear again.

TOTALLY frustrating. I kept going back to cam lean, but I couldn't see any. Figuring at this point I had nothing to lose, I twisted the yoke (the right side, as I'm holding the bow)....Got a little better, so I put 3 more in it. Perfect. Beautiful arrow flight again. Bullet hole in paper....I'm a happy guy.

The moral of the story is.....ANY cam lean isn't good. That string has to travel square or it's going to push the nock end of the arrow one way or the other. Unless I'm thinking wrong, which is certainly possible, there had to be some cam lean there that I just couldn't see.