Originally Posted by williamson
Kenny asks the right question. The most important part of the recommended mods is the movement of the CG to the rear. The stabilizer decalage is much less important and may not give a significant difference in performance. There has been endless discussion on RC Groups about the stab decalage. Much of this discussion about achieving improved performance has become confused because the decalage was changed and the CG was moved at the same time.
See the writeup by MIT chaired Professor of Aeronautics and Astronautics Mark Drela.
I like this part the best in his write up...
Where you want the CG to be should depend on personal preference and flying style. Some people fly with the CG well forward. Others seem to fly with the CG as far back as is tolerable.
Each to there own....