Picked up a B cabinet today, deal was too good to let go. Another 1960 Lead, with 75's too. Again, did not need it, but sometimes you just gotta. Time to meet the neighbors, lol.
I'd take the casters off the A cabinet just because it looks better without them, and it makes the stack more stable. And if you're a bit height challenged, it helps keep the knobs within reach. (I don't have that problem.)