Hey Ed,

"aerobat66 [C.G.] 3.5" - 4.25" behind leading edge of wing. Mine flew it's maiden flight yesterday, with the C.G. at about 4", and it was fine. I had about 3/4" of elevator throw (manual recommends 9/16"), and it was fairly pitch sensitive."

This is from a previous post from aerobat66 about the same question on the lt-40. Hope this helps