Intending to double my LiFePO4 280ah to 560ah. Debating whether to do 2nd battery in parallel or double cells in one battery. Chatting with Kevin Zhang at Daly BMS in Shenzhen he seems to think it is better to double cells and use one BMS rather than making a second battery and paralleling BMS. My thinking is to match each new cell with an existing cell (after balancing as close as I can with my limited equipment) connecting 2 in parallel and then 16 in series and using one BMS. Thoughts? Suggestions?