Well, I cut some 1/4" thick glass a couple weeks ago for the actuall external box. I just used one of those glass cutters that you score n snap with a staite edge. However, I pulled them out last night to silicone them together and noticed that the cuts are'nt that strait and wont sit flush against the tank. So, I'm gonna get a pro to cut these as I don't want to risk anything. My first thought was y-town mirror and glass. Then I thought to myself; maybe the old man (aka Stacker) can do it. So here I am asking as politely as I can after just calling him an old man.