[Hickoryhead]

your on the right track. You understand the concept. I personaly don't give up MAH for 20 to 80 grams of weight but thats me. I run 2 2s2p 6000 mah Lipos in series. The difference in weight between both batteries together compared to a 4s2p 6000 mah battery was close by like 60 grams.(I think) I would go with a little bigger batteries. I get about 35 minutes to an hour run time each time I charge them up. I run 2 batteries because I distribute the weight on my G2R chassis. 1 battery is better if your running the Revo chassis. Do you plan on sticking with the MM or upgrading to the MMM when it finaly comes out? Also if you buy 2 batteries remember they need to be matched. By this I mean you need to keep them charged the same amount of times. They need to be balanced the same amount of times. Everything needs to be done the same for each.