Thanks for the reply, I have a funtana 90 with a saito 100 it is so pitch sensitive and you have to keep trimming it for attitude the C.G is per the manual it is really pitch sensitive I mean really sensitive so would it help moving the C.G backwards and balancing or leave the C.G and make it nose heavy...this has been an ongoing problem with this model I have the 40 version also and no flight problems????so will moving the C.G aft improve stability??? Thanks again Colin.