I've never understood why anyone would use those limiting collars on his or her Reverb. Seems to mew that you'd want the saddle to go as low as possible.
I wanted a 100mm dropper for it but was unable to source on at the time I bought the dropper. Think about DH racers, they dont slam their seats. It's about an appropriate position for the saddle when at max extension. I always found when I didn't have the collar, I would drop the seat and then let it rise up about an inch so that it was in a comfortable position. Slammed is just awkward for me.