Ello,

I am building the GP RV4 right now (just started the sheeting) and I have some questions. I will be powering it with a .40FX if anyone is using this engine , how is the power? I am planning not to use the flaps because I can't couple my ailerons and my flaps so there aren't that much tricks I can do, if you think I am wrong please tell me.
If you are using the FX, how does she balance? Cause I want to ad some reinforcements at the tail so that I can install the tailweel in the fuse and not in the rudder, that system stinks.