I was going to drill my 75g, but as my fiance nicely put it...you crack it and you won't be replacing it
I heard a lot of great things about glass-holes.com and was even tempted to drive down to Fresno and check em out. You can get a drill bit for under $10 shipped I believe. There is a video on the site of them drilling a tank. Use a dam, angle the drill slightly to start the cut and go slow and lubricate!
I'm going to be drilling a 20g
sump and will be ordering a bit from them in the next few weeks,, but not ballsy enough to even try on my main tank. I'll deal with an overflow box
