Thanks for all the help fellas.
Flyboy Dave,
I did not know that you could use the center of the tank hole as a reference point. Does this mean that most ARF's have the tank hole in the exact center of the motor mount?
In other words, if I ever want to use a different motor mount, with a different blind nut pattern, I can just center the new mount up on the tank hole?
P.S. Thanks for taking the time to snap a pic. Really helped.