I would prefer not to power from a BEC. Currently I use 4 x 4s 8500mAh batteries split into 2 banks, each bank has 2 x 4s 8500mAh connected in parallel providing 4s 17000mAh, I then tap power from bank 1 for the A2 (4s) I then connect the 2 banks in series providing 8s 17000mAh to the ESC's. The...