I will be moving soon and breaking down me tank since my tank will be empty this will be my only opertunity to get the tank drilled. My HOB PVC overflow works fine but the drilled overflow always have sharper cleaner look. I found out thru emailing Perfecto that only the bottom pain of glass is tempered. So I need ideas on overflow for the side panels of the tank. Any one have any good ideas or sites for a quiet drilled overflow?