Here is today's progress.
The first set, these are 43X60.
and the second set, also 45x60.
The other two sets are a bit smaller, so hopefully I can fit them all rolled up at one time. Otherwise I'll be taking some off and reattaching the backing to the leader. That isn't a big deal, but it will be faster if I don't need to. I've got about 2' more backing then I need, so plenty of room.