When you get your ESC back from castle and you still want to run the Moabs thats fine, but I would seriously considering gearing down a bit when running
6s. Going buy what you wrote about gearing,motor etc your topping out at around 58mph, it's a bit much ?
If you haven't seen this it's a very helpful tool thanks to BrianG.
http://www.scriptasylum.com/rc_speed/index.html