How much more torque do you guys think the .21 3-port will have over the 7 of 5 port. I am thinking of getting a 3-port for my Caster K8T to replace my Axial .28RR. How do you think it compares to the Axial? I am afraid the 3-port will be too much power down low for my driving. I like to be smooth and not have a motor make power like a lightswitch when you just tap the throttle.