I have a set of those carbon fiber clutches from Barnett. I got them from STY. He sent them out and told me to kick the shit out of them and so far I like them ALOT!
As far as weird things done to my clutch, there is lots of Cryo treated parts. The hub, basket, plates, springs, driveline unit. Mostly for strength and wear resistance. The springs the drag guys wouldn't notice, but for something you ride a ton you will notice. It seems to keep them consistant under longer races. Cryo really helps the plates with warpage as well which is the big thing for me.
Prep and maintainence, well I guess in dummy terms that means, fighting the glaze. Nothing worse then seeing guys glaze clutches with nearly all the friction material still in tact and wanna throw them out because they think it's junk. (Tip, the heat/oil work hardens this stuff) some guys simply hit their frictions plates with a scotch Brite or roloc on an air grinder. Kinda works, but I think it leaves an Un even surface in some points which causes some issues.
Me personally I use a piece of 400 grit on glass or my machinist granite block and figure 8 the frictions just till I get fresh uniform surface. Tip: don't use your hand as pushing with five fingers creates five points of pressure which leads to Un even surface. I lay a round chunk of steel over the friction and hold it from the side and move it. You need to be hitting everythig with a micrometer before and after. My steels, I've come up with an idea that seems to work really well. I used to do them like the frictions but took time and I don't like making them thinner. So I came up with a chemical solution. Acid etching. Dunk and scotch Brite and they are good as new. Damn near Zero material removal. There's other stuff, but that's the basics of it in my bike.