Rabbit fur will mat up if you wring, leave them un-split in the buckets and worst in the dryer to 'break' them.
You don't need to flesh rabbits that much, there are two sections over the shoulders that have a lot of flesh and some around the neck and hips. Only the shoulder stuff needs to be removed, rest wont effect it too much if at all.
I tried the mayo tan, I can't get them out of the crisp stage now...water doesn't seem to soften them any more and the mayo made them greasy, had to wash them real good, but it's hard not to mat them.
Just pull the hide off the critter, scrape off as much flesh you can and toss them into the alum/salt bath. Then wash them gently and start drying and stretching/breaking. Done.