Glass cutting?

[TheReefGeek]

If you get the proper tool to score the glass, and are careful (might take a little practice too) then score and crack should work great, this is how window companies cut glass, with a machine that scores and breaks it.

The "best" way to drill is with a diamond drill bit on a stationary drill. This is how I have drilled my sumps, the bit is expensive but pays for itself in the end, and it is just cool to drill your own glass. It is definately possible with a rotary tool though, I read the same post on RC.