[canadawest]

I had my little 10g drilled by a glass shop, and it's only 1/8".

The guys did say though that with glass that thin there's no guarantee it wont crack while being drilled, and they were pretty nervous during the procedure but it turned out great.

In hindsight the only thing I would have done different is drilled a 1" or bigger hole instead of the 3/4" hole I got.

Hole was done on the side pane near the top and centered left to right. (Overflow drain)