So I acquired a RedSea reefer 525xl and it had some funky plumbing work done and a bunch of excess silicone. And it looks like it may of been drilled second hand some I question the plumbing now. Here is where I’m thinking crazy what if I cut out the center overflow and expose the holes. Take a 1/2 cut of glass and silicone up the original holes. Then I’d like to order a coast to coast overflow. And then drill holes for the over flow and two return lines. The back wall isn’t tempered is it? And am I crazy for doing this to a RedSea tank!?