<div style="text-align: left; ">Hey guys,
I've been into nitro for about a year now. I have an OS FL70 and a Saito FA62A both in very good condition, no crashes. The FL70 has been on an airplane for over 60 flights so far, and the FA62A has been run 3 times on a bench. As I was setting up my Saito, I decided to check blade tracking by putting my airplane on a stand with a solid point on the ground (an oil can) and I rotated the propeller to see if the distances were correct. The tracking was 1/8" off (by the way this is with a 13X6 APC, brand new). Because of this, I tried another 13X6, also brand new, and this time mounted it with the stock prop bolts that came with the engine, only to get a similar tracking.
I then looked at my FL70 for comparison. This one has already flown over 60 flights, and uses an APC 12X7. Upon looking at the tracking, same method, it was a whole quarter inch off!</div><div style="text-align: left; ">I had noticed that plane shakes like crazy, but figured it was the 4 stroke...
Just for one more comparison, I looked at the propeller on an electric of mine, which is a 14X7 mounted with a nitro prop nut on its adaptor. This plane has hundreds of flights on it. It also had 1/8" difference between each blade. I had noticed even that plane shook like crazy but thought nothing of it.

Clearly, something is really going on here. Every propeller is APC, and properly balanced. They are all attached using hardware from Tru Turn and OS. I always ream to the correct size, using a standard reamer.
Is there a way to adjust the tracking? I have no clue what I've been doing wrong all this time...
Please help, for now I'm groundng all my airplanes until I figure out what's up.

Thanks in advance
Mike</div>