Ive done 2 of these planes.

Pics of the tail mods are in my gallery, with a few more of those to post also.

Dual elev servos are the norm if your going with a heavy engine, both planes have this mod. The easiest way to mod it is to do it before it's built, before the horizontal stab goes on anyway.

605's are plenty for this plane...all around. Although there are more precise servos available...you can easily put more in the plane then its worth..... It flies fine with 605's though.

Balance range is 4.5" to 5.25" measured from leading edge at fusalage. Ive found them to balance precisely with the Rx/batt mid way in radio compartment. This is with heavier engine, and rear mounted elev servos.

Nice planes once you get past the mistakes in the manual, and the overall fit inconsistencies.