lmao, I always tuned mine by temp. And never did I shut them off by pinching them. I always touched the flywheel to my shoe. But, you should have a smooth idle about 150* and after hard flying, should be running 190-210* with a smooth transition from low to top power. Why are you worried about this now? I thought you had it tuned?
Don't forget, if the humidity changes, you are going to have to retune it. Meaning, you will always be tuning this thing. It's not constant like an electric motor.