Don, servos are all mounted in the rear of the plane. It balanced just fine like this with no added weight (battery is sitting where the elevator/rudder servos would have mounted in the fuse).

Jack, I understand exactly what you are asking. This plane could absolutely be good for 3D. I may switch back to my wide-blade prop at some point and see just how good it is (but then again, it's only as good as the pilot, right? )

Sam, if you have the 1.10 then it is certainly the ticket! The power difference between the two engines (the .91 and the 1.10) is not huge, but more is always better right? In all honestly though, I don't think you would be disappointed with the .91 here at sea-level. By the way, I fly at Marymoor in Redmond. Bring yours out when you get it put together!