Well I followed the instructions on this page http://www.sparklingfloorservice.com/tank/overflow.html and was able to construct my very own overflow. Its 11 inches wide and so the weir overflow part has a surface area of 5.5 sq in. For reference, a 1 inch tube has .785 sq in of surface area. So it can easily support up to 3 1 inch drain tubes if needed. It was great fun, but the best part is that it cost a grand total of $15 for all parts, acrylic, and weld-on
I tried to take pictures, but since its clea acrylic, none turned out very good. Any advice on what background to use to try and make the thing appear in a picture?