i have a brand new set of http://www3.towerhobbies.com/cgi-bin...?&I=LXHGE7&P=7 and http://www3.towerhobbies.com/cgi-bin...?&I=LXHGB6&P=M i was going to put on my emaxx but they look good sittin on rustler.....are these a okay choice for the speed i want to run?????????