Thanks I wonderd a bit about that. I have a moki 210 it has a hole down the center of the crank pin, which means it is to weak to turn down an press on a race like you did, I thought maybe I could turn it down a little and TIG weld some hard filler rod on then grind it to size, what do you think?

I don't neccesaraly wont to convert to gas but to be able to use a little less than 20% oil would be nice.