I don't mind at all
I think the long cut probably took half an hour and each of the bulkheads 20 minutes. The glass on a standard 20gal is 5mm - I'm sure it would take a lot! longer if you were cutting 1/2" glass. I could track down the part number for the dremmel bit if you would like (it was about $15). Or you could even borrow mine.
Cheers,
- Chad