Ken:
If you get yourself a new Ryobi--as I did--and buy the conversion parts from www.wackerengines.com you'll have a much more reliable engine than any glow engine on the market. The carb is much easier to adjust. The needles will stay put--no need for tweaking the needles from day too day--as you do on a glow engine.

They are about $200 cheaper than a Saito 150. Thats $200 you can spend on covering, servos, etc... And you'll be able to fly the gasser for pennies compared to a glow engine.

I'm pretty sure C_Heath is going to use a 25cc Toro weedeater for power.

The size and wing area of thisplane just lends itself to a conversion engine