This is frustrating me/others.???

You are asking for help , but doubting the advice.

1. Forget your inane wanting to try different fuel. you are wasting your money as nitro is not the issue. Thousands of people use it.
2. Fix your carby screw. - Otherwise OS would make the engine like this. It is a highly potential area of air leak!!!! =Leaning the engine= hot =current need for needle adjustment setting
3.. You are overpropped!!!!!!
If you dont try these things dont ask or help!

Phew ...now i feel better! hahah