Thanks for the replies guys.

I have been contemplating the step to gas for a long time and have been thinning my hanger in order to migrate that way.

In addition to moving up to gas I am also interested in machining / converting my own engines. My dad was a tool and die maker and first class machinist for 40+ years and since he has retired (10+ years ago) he is itching to get back ona engine lathe & mill so we are looking for a project(s).

Ideally it would be really cool to machine / mill a new crank case and shaft and untilize existing pistons and jugs, etc. for the top end.

However, neither my dad or I have enough small engine experience to design and fabricate the crank, although I suppose some research could solve that problem.

I have been following the threads here on conversions and find them fascinating.

I have also visted your webpage RCIGN1 and it is very impressive and cool especially the drone engine .

Are there any other web sites which have similar information on conversions and design that you guy's are aware of?

GB