i havent worked with this material specifically, but generally when i work with plastic, and also for many other uses, i have this:

http://www.amazon.com/Proxxon-38472-.../dp/B0017PWTX8

then i just put in a circular saw blade, one of the ceramic ones without teeth, and it will cut any plastic, easily, with high precision, and without breaking anything. i mean, with that you can cut a glass bottle into slices.


or you could try to make the edge of a knife really hot, so that it will melt through the plastic, and cut with that. or just try a regular saw, for wood, and be really, really careful.