Guy King wrote:
The message from Chris Bacon contains these words:
I drilled through a toughened windscreen some years ago, which
was OK..... I can however tell you that using a glass cutter is
not a good idea. Amazing how far the bits go.

Hmm. I tried it a couple of times with toughend quarterlights without
success. Laminated's OK, of course.

Yup, but laminated is a bit of a sod to cut accurately, I've
only seen it done by a glazier. I wonder whether a fine stone
on one of these "Dremmel" things would drill toughened? Bit
dodgy I should think.