X-Ray: Did you tweak or balance the car with the smaller bat? Without the larger pac the car is light on the right rear. May work for you, maybe not? With my Trinity 1150 pac I set ride height than tweaked it with my MIP Tweak station, I was kinda shocked. One full turn down on left rear shock preload, 1 round off the right rear preload to get the ride height back to 5mm and tweak was perfect, front and rear. I think the BMI and all other chassis's are really designed for the bigger bat pac, for weight. Jay pretty much done his homework on the design of this chassis, he has covered all bases.
Good luck with the chassis, it's the best upgrade I think you can buy for the car!