Tanner - . If its not broke don't fix it. I'd check with Matt Mink, Cayon Creek or even Angus before I started whacking the fat off the slide, there isn't much there to whack. I had 5 oz taken off one of my open guns, but there is lots of fat on a 1911 slide, and a compensator to slow the thing down.
Still plenty of room on a CZ to remove material from the slide if one so desires. Done all of the time with Tanfos, and the slides are roughly the same size (both start out lighter than a stock 1911 slide, BTW, but both can still be lightened some more). People have done it with CZs as well, it's just seen less, given that CZs are already seen less than even Tanfos in the divisions where one can start hacking on the slide.
Theres not much to take off, but i'll take every little advantage I can get.