Anyone using a cold air gun?

Hello,

I'm thinking about adding a cold air gun to my small cnc machine for
production in delrin, brass, and aluminum.

Does anyone have one of these? A company called Vortec makes them,
I'm sure other companies probably have them too, and I found the
Vortec brand at MSC Direct's site.

I was planning on setting up all this in conjunction with my chip
collector, the cold air jets pointing toward the suction area of the
collector (on the other side of the cutting tool). This will probably
work real great with messy plastics.

any experience with these tools would be greatly appreciated,

Jason