ORIGINAL: christrump
Also the CG itself I see has been moved to 12 3/4. Is this optimum or can it be moved further back?
Chris,
12 3/4 is optimum and should not be difficult to achieve with batteries (or a little extra lead) in the nose. Oddly, this is one airplane that does not fly as well with even a slightly forward CG. I suppose you could experiment with moving it aft a little, but I would suggest going with what is proven.
Just a reminder, the 12 3/4 is along the leading edge, not straight back along the wing root.
Craig