One bms to control 3 bms, it’s becoming a logistical nightmare. You would be best served getting one 36v bms to service the whole pack without the original 3. Also if one of the original 3 bms gets a fault you basically overload the other 2 left, either way it’s not a great scenario. Seeing as it took 2 years to get out of balance most just rebalance the 12v packs once every 8-10 charges, but the fact you already have 3 bms with the above problem you would be best serviced with a 36v bms. I have a load from torn apart hover board packs you are welcome to if that helps but I am unsure of the amperage they allow, there’s lots of people here testing and probing these packs so they can give you a better idea.
Intelligence is distributed nearly evenly, with only the occasional concentration in one person. The total quantity of Intelligence is a constant: as more people come into being, fewer and fewer get a sufficient amount for themselves.
Some say this has already reached homeopathic levels.