Novak GTB 6.5 on 7 cells?

Ok, i just bought 2 7 cell, 3800 mah batteries, around the same time i ordered the GTB 6.5 by Novak.... What i found out later : its rated for 4-6 cells, or 2s lipo..
Has anyone ran there GTB setup with 7 cells? Or do you know if it will fry it? I have a after market fan that moves some serious air, so heat shouldn't be to much of a problem. any help is great!!