Hold on Mich! I've got a CNC'd kit coming out to solve all those problems. It's a CF mount w/175ml Trinity Spyder tank and 2450mah Li-Po pack. These are pics of the prototype.
http://tinypic.com/view/?pic=9lfofq
http://tinypic.com/view/?pic=9lfono

I ran 2 hours of practice, 2-7min. quals, 1 hour of tuning/bashing, and a 15 min A-main without charging a battery!!!! You want this set up. It's one less thing to worry about. I left my charger at home!