Eganwp - I'm on the verge of going gas, but don't know enough about it. Can you recommend an affordable and reliable gas engine for my 78" Texas Hurricane? I'm about to install an OS BGX-1 3500 on it, but am a bit worried about it getting only 10 flights to the gallon of 10%. ($10 for a day of flying - not the WORST thing in the world, but..). I'm guessing a 43cc engine would be a good size? Or less?