ran the E4js last as my new TA car ....loved it!!!!! small changes from out of the box and it was dialed for carpet ... i cleaned the bearings.. AE springs f/blues r/greens moved rear uper shock location in one hole... tightened side belt slightly to keep it from jumping teeth gearing was a kimbrough 104t spur /PRS 51 pinion

it feelt really smooth to me ....