So I have a Elos tank which has a corner overflow built in. They have their own overflow box which if removed the bottom glass has a rectangle missing (where the overflow box was, however the tank walls are all complete. So the female plastic overflow fittings which are all one piece and can not be removed unless you replace the whole overflow, has a crack going up it.(which i tried contacting them to see if i can get my hands on one however no luck.) i was wondering has any suggestions, what I was thinking is get a whole sheet of new glass with holes drilled and rest the whole tank on top of that new glass. Obviously put tons of sealant between the two pieces of glass. Anyone have any suggestions?