I'll try it again....(#%$#@$ Server error!)
Kevlar is a bit of a pain to cut when it's already laid up, as it tends to tear/shred/melt rather than cut cleanly. Maybe if you used a Dremel or air powered high-speed cutter with a wheel made for kevlar (If there is such a thing), it would cut better, but it may still melt at the site of the cut. Glass is definitely easier to work with, but kevlar isn't impossible - you just need to do your homework before cutting.
The Connyak BBS