Drilling a nano

[dmagrath]

I've been turned down by big al's to have my 6 gal drilled. What's the chances it will break during the drilling? Do they drill a circular hole in the bottom of the tank, or cut squares out of the back glass plate for an overflow box?

Thanks for any help!

TANK BUILD EQUIPMENT SO FAR:

70w DIY MH (gotta figure out what kind of bulb is in there)
Coralife 12" CFO w/actinic striplight
AC 50
Eshopps hob nano overflow
Hydor submersible heater
2 5w comp fans installed into tank box

8gal aga