sherry, the only correct way to cut a big enough hole is to drill it. i have never done it (i just can't bring myself to "ruin" a glass cage..lol), but i know many, MANY people who have done it, and they all tell me the same things, go slow, use very light pressure and keep it cool with water and you will have no problems. if you play the "helpless woman" at a glass shop, they may cut it for you, but won't guarantee it. we men are always a sucker for the damsel in distress