well ive got a 3.5t in my 1/10th buggy racer, ive had to turn the end points on the controller just to make it usable, but its nice knowing that ive got power in reserve if wanted, ive always been of the opinion of i would rather have too much power and not use it, then not enough power and crave for more. and as you said they are only 3 quid, you cant go wrong.