Hobbico Avistar C.G. Range...
Tower's specs list the CG range between 3 5/8" to 4 1/2" back from the leading edge with 3 5/8" as a docile starting point.
At 2 3/4" your a little nose heavy which will probably be OK but it might make flaring for a nice landing a little more difficult. Have you tried moving the battery a little further back?