The 30cc Homie converted to CH is lighter than the Ryobi with CH, if you include the motor mount the Ryobi needs. If you cut a hole in your firewall and mount the engine direct to the firewall the Ryobi is lighter and cheaper but still down on power.

We are running a Poulan 46 with CH on it and is running pretty good. 7100 on a MA 20x10 Classic. Converted if weighs 3.5lb, engine, H-9 motor mount, muffler. You are going to have $350 in a DIY converted one. About the same power as a Brison 2.4 (39cc vs 46cc) but down compared to a BME 44 or a Zenoah 45. Overall a good SPORT engine for something with a 78-80" wing