Hello... This question is for all of you weedwacker converts out there... I am a new convert myself and I am building a Cessna Agwagon from scratch. It will have a ws of 84". I could probably use a 120-size glow, but I really want to put a gasser on it. Unfortunately, I don't know which engine to use. I have a Homelite 25cc lying on the shelf collecting dust. Are there any rules of thumb to go by when choosing engine / prop combos for aircraft size??? Thanks in advance for the info...

DF