The Homie 30cc needs a lot more pruning, as I mentioned above. Here the work I have done on mine so far. The bare short block with only the spark plug weighs in at 2 lbs 3.7 Oz. so far. That is without the flywheel and prop nut in the picture. I don't like to run my conversions on flywheel. It's on there now as a crank turning knob.
I'm sure I can get the short block to under 2 lbs, which puts me back even with the Ryobi 31cc.
The potential is there, if maybe requiring a few more clams and a couple jars of elbow grease.