I just went to a consultation with a NYC hair-doc (well known/respected) and he said that due to my previous HTs and a tight scalp that I would need a dose of "Hylenex" at the time of the HT to relax/loosen the collagen temporarily in order to get more grafts from a lower (physically lower) strip location on my head.
This isn't cheap, either -- $500.
Anyone ever hear of this stuff or its usage? I didn't get any hits when searching on it here.