I just started flying my Ryobi conversion a couple of weeks ago. I started with the magneto ignition and changed to electronic after I figured out how the engine was doing.

My engine is also a twin ringed engine. I was getting nearly 8000 rpm with an 18x6 prop. I went to an 18x10 and get 6800-6900 rpm, which is a good place to be on the torque curve for this engine.

I closed off the bubble primer port and use the choke. It will not fire until it's been spun with the choke on. Once it fires, I turn the choke off and it starts right up at that point.

The engine is on a SA Super Decathlon that I shorted by 1.75" because it just looked too long. There is more info about this on the ARF forum.