I had a Thunder Tiger GP-40 I bought off Ebay in like new condition I put on a SPAD coroplast model. It would flame out about one minute into every flight. I spent more on glow plugs than what I paid for the engine trying to get it to run. I was using Cool Power 10% fuel. Then I put some Power Master 10% in the tank and it ran till empty. I did it again with the same results. I flew 5 tanks of fuel through that engine without a bobble.

That was the only time I have ever had trouble with cool power fuel. So don't hesitate to try a different fuel. It might do the trick for you.