Nice engines Newob, If you google free rcm plans you will find another forum where posters have most of the plans ever made for the magazine. You should find a fun and challenging build. Our mIllwright at work gave me an OS exact to yours today, but no muffler either, he also gave me a Fox 19, but it looks like neither one will run again, I am going to post pics in the Glow power section later this week and see what the more knowledgable have to say.

Calvi