ok so i was at the hobby shop i deal with lookin around and i all there nitro engines are on sale the one that cought my eye was an os 18 cv r its 99$ i here you all say there really good but is it going to brake stuff all the time or what i want to play with not fix it after 5 mins if ya know what i mean i want it be powerful but not to brake stuff all the time.i also have heavy duty diffs now so help me guys