Ok, thanks. But what about the thinkskin as a border? Basically the backs and sides of my head are starting to get really thin. I used to be able to support like 70-80%. Now I'm thinking less than 60%. I don't really want to use any significant amount of polygauze, and I don't want to go all lace. I hate all lace.

I've taken a look at the "exercise" model, which seems like a good design for my needs. However, I'd like to know how long the hair will stay in in the polyskin. Thanks.