Myself and afew friends at our local switched from NiMh's to LiPo's and strangely enough the general feeling is that running LiPo's
without the extra weight makes the car handle/feel better than when running LiPo with the extra weight.
This presumes that you are already running the 'lead behind the bulkhead', but otherwise we are running no extra weight and find the car very much planted.
Prehaps its something to do with reducing the 'penduleum' effect? Dunno..but it sounds fancy
Or...do what I did and buy an S2
lol