ORIGINAL: Don M.
I have 26cc, 40cc & 50cc gassers and am finding it very difficult to see any advantages to gas under 50cc other than somewhat cheaper to operate and if I was that strapped for cash I would find another hobby. Again my .02 worth.
No goo to wipe off the plane.
Nothing like spending the day flying, and wiping you plane down in 30 seconds.
That right there is enough reason to switch to gas if you can get the performance you like.