RE: Goldberg Extra 300
My Extra handled the extra weight of it's gas engine quite well as it retained ALL of it's impeccable flying manners, while it's flight performance showed a marked improvement with the additional umph up front. Although Ralph's ignition and diet treatment lost the G23 a full lb. of weight your engine choice should be a lighter and more powerful one which should prove to be an ideal power source for this outstanding and well mannered flying model.
Karol