Jay Honeck wrote:

I *do* have experience cutting the holes for these louvers, though. With a
dremel tool it's not too bad, in a tedious sort of way, and if your plastic
is not too ancient and brittle. If it is, you'll find that it will simply
shatter when you try to handle it.

A better idea for cutting the plastic is a heated X-Acto knife. Most hobby shops
can sell you one that screws onto the tip of a small soldering iron.

George Patterson
Love, n.: A form of temporary insanity afflicting the young. It is curable
either by marriage or by removal of the afflicted from the circumstances
under which he incurred the condition. It is sometimes fatal, but more
often to the physician than to the patient.