Notching glass for external overflow

[StirCrazy]

using a dremmel sucks the big one, I used a glass cutter then used the dremmel just to smooth out the cut. you need running water to keep it cool, and you very well might destroy your dremmel, or at least the flexable wand part of it

if I had to do it again I would drill two holes one on each end of the cut out, the using a glass cutter scribe to conect them, bust out the glass and smooth it over.

Steve