The 120 size 4* flies great wuh a G 23 or a Homelite 25cc conversion. Not as peppy as with a big glow but IMO easier to handle and cheaper to run.Just remember to set the firewall back 1 1/2 inches to allow for the extra wieght of the gasser. It is easier to space the engine out than try to add tail weight to balance it. If you want you can cut off the sides and use a Golberg Chipmonk cowl for a different look.With a Ryobi with the rear carb and muffler there would be even less holes in the cowl.

Randy