Banks are labeled A, a, B, b, C, c, D, d, E, e and so on. You have 100 slots available for each bank. The allocation must stay withing the same group A/a B/b C/c ect. You could have 50 in A and 50 in a or 10 in A and 90 in a. You can not move slots from A to B.
With a slot card you can save 4000 chanels in groups of 1000. Kinda like GRE's V folders. It works OK but is a little hard to move around in.
As far as memory management, the BCD396T is the Bomb! There is no limit to the combinations you can set up.