i have been trying to get a drilled 20 long for a time now and I just got informed that all the custom places dont do a overflow for that small of a tank. So I have to drill myself. I dont feel comfortable doing it my self. Would any veteran reefer possibly drill my tank for me, I can pay, i can get you the bit any thing you need i can get. Also if the tank does break it wont be a big deal the tank is only 35$, i know glass drilling even when done right can break a tank. Thanks guys in advanced