Drilling a tank.

[xtreme]

I drilled mine recently and is was easier than I expected. Just go slow and make sure your drill has a clutch and is set really low so the bit won't bind up. Take it slow and let the bit do the work. Build a dam around your holes with plumbers putty or something to keep water around the bit for lubrication. I ordered my bits from mops.ca and it worked well for a couple holes. Probably wouldn't get more than a couple holes out of it though as they are fairly inexpensive. And make sure to catch the glass disk so it doesn't fall and break the glass.