[magman]

I have had 2 buggies and each one was a little trial and error to get it just right. What I did was Velcro and older pack to chassis and secured it down then tested before drilling a screwing in my batt tray.. Each buggy was different...my mbx5 like more forward placement, the losi liked more rear. Also, different battery weight also made a difference. One test I did was with a 5k 5s and I tested it again with a 3k 5s and it did make a difference, slight but a difference. Since I no longer race, I run all my rigs in the middle.