Finally switched to a MMP (from the Sidewinder SCT) with the SCT 3800kv motor and it's a great combo. I've filled the diffs with 5-7-2 and it's geared at 18/42 (for bashing) and it's so smooth. I love this truck, can't wait to try it on 3S.
Out of interest, has any one switched out the standard shocks to something else, not that they need replacing?