I don't think I want to use the Rossi motor on a trainer. It sells for close to the $350.00- $400.00 range. Ok don't take this wrong but money isn't the problem, as a buddy of mine use to say "I got a lot of problems but money ain't one of them"
I am a builder, hince Gifford/bilt. That is the name of my business and that is building Harley Davidson engines. I specialize in the Shovelhead engine and can do anything to a Harley engine that needs to be done, from an empty table to a firebreather. I am always trying something out of the norm and I have lots of rc car and buggy motors that are just layiing around and just want to see if it would work. Then when ask where did I get that? I say its Gifford/bilt. I been in business for thirty years this summer.

A couple of my megatech .16 motors have the correct shaft and may have come from a plane as far as I know, they have the small rippled flywheel on them.

But what I really want to do is build me a Diamond Dust with twin Rossi's but lets get the trainer built first hehe