Ian Bell wrote:

That I do most sincerely believe. I had some smaller PCBs made ( about 4
inches square) and had to cut them out too. I consumed one Junior
hacksaw blade every two cut sides.

When they drill they boards, they use very small carbide drills, and they
replace them after a fairly small number of holes. (This is, in fact,
why a lot of board houses have an extra charge per hole). There is a fairly
large aftermarket for the used drills, since they are still perfectly fine
for drilling brass or even steel when they are too worn for fr4.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."