well i can tell you that after leaving the battery for a whole day, un-connected all the cells are still at 3.55 volts, although i initially charged up to 57 volts it's not 56.8, if' that's not balacned i don't know what is.
the story of teh battery is rather simple, i heard that a123 cells are very good batteries, and i heard that they went backrupt, so i figured i'd better order them before they run out. but i didn't want any block size battery on my behind, as i hate to not use the real-estate triangle i have, so i went to a123rc as i figured they hold these batteries. after ordering a few cells to see if they are legit, we went back and forth about the maximum triangle shaped battery we could fit, and they came up with 16s8p configuration, however for the bms, i didn't want to use their's because cellman was selling smaller and better ones spec wise, so i bought it from him and had him send it directly to them, after they did all the testing on the bms and cells, they send it to me.
i also ordered a 10amp charger, when initially connected to the battery ,sparks flew, and the charger stopped working, when i opened the battery i noticed they didn't place a pre-charge resistor on it.