there is one big difference between our packs.
Both use 12S 20Ah pouches,
BUT
I do not use any BMS on mine. Only high voltage cut off for charging and low voltage cut off on discharge.
NO BALANCING , NO TOP BALANCING.
I bottom balanced them only once and even after slight current draw they come to exactely same voltage by themselves.
Came from trip today 25kms - all 12 cells read exactely 3.29V