Scott,

I hear what you are saying. We know that the YS big block 4 strokes are more frugal when being run on ignition. But that's glow fuel.

RM should be able to tell us some of these particulars such as what exhaust system, what prop and rpm, and what carb changes if any. It may all be moot though since my 33's run 20+ minutes on about 10 ozs of gasoline....I never use full throttle for 11 lb airplane. So even if we lost 5 minutes of run time if we had to run a slight bit richer, it's not a big loss. But of course that's only my opinion.

No matter what, I see the glow plug in my future developments as well. This new thingy from OS is most intriguing. If it works as advertised and keeps a good idle and transition long term, it will shave about 4-5 ounces from the CDI set-up with IBEC. And that's great news....Then my Delta will be less than 10 pounds.