I had such great success getting my McCoy Red Head Lightning Bot 35 to run a 4 2 4 break on a Ringmaster using a 4oz clunk tank that I wanted to see if I could get the Fox 35 to do the same. I spent a lot of time the end of last year with the Fox 35 Stunt and tried the popsicle stick one time, JB weld in the port another time with no luck. The problem I was having is that the engine kept on running away into a 2 stroke half way through the flight. I tried all caster 10N 28 oil fuel, 10N 25 oil fuel, and Power Master GMA 10N 22oil fuel, same problem every time, and using the same tank I used with the McCoy 35. I removed the JB weld and put the case back to stock and flew the Ringmaster but now I had the Fox Burp on outside loops. I was ready to pull the Fox for good, but tried it one more time using a larger .156 spray bar and bingo, no more burp! I also can use any of the 3 fuels I tried before. Fox .35 venture is .270 and the stock spray bar is .130 and that makes a large area for a slow running engine. I also added one extra head gasket because the engine was breaking hard into a 2 stroke from a 4 stroke. The best prop I found to use is a Bolly Clubman 10.5x5. Good luck with setup and let us know how you make out.
Al
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