Replacement esc for 1's Supastox

[Staxman]

Good afternoon

I am looking to replace my current esc in my supastox
When I started I just bought the Core RC starter pack...basically just to see if I enjoyed running this class...but now I want to be more competitive.

So I guess the question has to be what esc should I be looking at, with approximate prices.

Also, because I am new to the class, and not 100% on the rules...is it permitted to alter the timing on the motor's end bell, as I know the esc has to be in blinky mode

Thanks in advance