For idle to full power, the stock carbs are fine.

The stock carb when properly sealed and wired wide open works perfectly for c/l stunt.

Found the carb barrel, stop and arm for all four of my FS OS engines. They were all in zip lock bags in the box for the 52. On the 20, 26 & 40 I had someone make up a black plastic insert that was drilled for the venturi size. It just pushed in were the carb barrel was and sealed it off. On the 52 I got a whole new carb stack and added a venturi piece with conventional NVA, so have the complete carb and stack for that. The carb for the 52 is a bit heavy so if I go that route later I will think about a lighter carb setup. I'm thinking that I will add a flat thin rubber washer on the arm end to give a little extra seal.

I plan on starting with the 26 in a S1 Ringmaster for the low to up setup with the electronic stooge from Mark Wood. If this works might do something bigger.

Best,   DennisT