Well if you were attempting to do speed runs, there would be no reason to use a 10,000 mah pack with the same amp rating as a 5000 mah pack anyway. Otherwise you are just adding weight. I bet a neu energy 4s 3300 mah 30c pack which costs the same amount will out do a 10,000 mah 10c maxamps pack, and it will be about a pound less weight. Maxamps cells are overrated imo.
Check out my custom converted 8ight:
Sub 7lb, lowest CG of any 1/8 buggy