I was at the motorama event in Harrisburg this past weekend. I notice what all the big guy's were running. Most were using the tekin rx8 esc and 550 sized motors. I decided to go this route as well for my race slash. My only question is what kv rating to select. With a 550, there will be more torque, so it can swing a bigger pinion without the heat issues of 540's like the mambas. I will be running 2s almost exclusively. I am thinking something between 3400 and 4000kv. Any thoughts?