The answer to any CG location is as easy as 2 minutes with a yardstick. Take a look at the few measurements that www.geistware.com takes as input for their CG locator application. It takes only a minute or two to make the measurements (which are dead easy to do) and only a minute to plug them into the application.

http://www.geistware.com/rcmodeling/cg_super_calc.htm

Simple to do.
No real effort.
Absolute accuracy.
Not biased or sound byte BS.