Haha! Yeah, I was SOOO close then "WHAM!!" i was like oh sh....!!! I lifted up the tank and, relief!!!... No crack! It really wasn't that bad. It took about an hour and 1/2 total time, I would say.

I also found a lil trick to reduce noise, if its an issue... I put an old bed pillow and a couple of towels inside the tank. It helped quite abit.

I don't think I'm gonna drill any more holes this go-around.. I don't have a need for it.