I did drill my 58 gallon.
I have heard not to try on a 10 gallon, as the glass is too thin. What size hole do you want? I have the bit to do a hole for a 1 inch bulkhead. If you have a tank, and do not have the baffles in it, I would take a shot at it, but since I have not done one of these, I cannot gaurantee it won't crack.
Maybe I could do this at the next meeting so that people can see how it is done.
Chad