Somewhere earlier in the thread I remember that someone has put a question to Hacker USA and got the answer that 17x10 should be OK. I agree that motocalc shows >180C for a prolonged full throttle for 10S 17x10 combo which is unhealthy. Still a low timing instead of high timing on the ESC can bring this considerably down. I have to admit this is only based on predictions from motocalc and that reality might be different.