Personally, I think the Saito 220 price is ridiculous. You can buy might decent 40-60cc gassers for about $500. I'll have to agree that gasser is the way to go with the GP Patty.

I can understand why someone would want to stay glow. It may be the familiarity factor, or it may be the initial cash outlay limit. Even though I am a big gasser fan for giant scale stuff, I still keep a few big glow motors around. These days, I don't get to go to the flying field too often, so fuel cost is not that big a deal. Now if you pratice IMAC or 3D on a daily basis, that'll be a different story. Plus, think about it, these days most of the "fuel cost" is probably spent driving to the flying field and back in your SUV or truck. For me, it's a $4 roundtrip gas bill eveytime I go to the field. Back when gas was $3/gal, it was more like $6 a trip.

I also have so many different planes, some of which just sit around all year in the hanger. It's hard to justify hanging $500+ engines on them. So..., if you really want to stay glow, the Moki/Mark 2.10 is the best bet for the Patty.