A word about 007 balance
I got all the electronics in, working, and setup today and to my surprise it took only 13.1 oz total on the battery side to balance
the car. With the Orion 3600 at 7.7 oz, I added the base inserts at 1.2 oz, then the iniversal weight with just 4 of the 7 1/4oz weights to get there. Method used, is a proven dual scale balance, accurate within +/- .1oz.
I'm running Speed Passion 13.5, Speed Passion GT programmable ESC, Futaba 9550, and Futaba FAST receiver. The cars total weight with body came in 1590 grams so that is good (US version pretty well stock).
So users of the heavier packs that have done the top deck mod to fit (5000 mah generally 9.5 oz. could use the optional, less expensive 2.5 oz fixed weight and and be right there.