I'm setting up an older 90g tank next weekend that has no center brace but is made of very thick glass. I need to find/make a glass hood but all the ones I've found commercially leave a sizeable gap for a center brace. I'd like to get a local glass company to cut two pieces that I can hinge together myself by buying a hinge online. My question is, will a 48" strip of glass be secure running across a tank with no center brace? Or should I ask them to make two smaller lids that can go side by side, each being half the length of the tank? Also, is there a certain thickness/grade of glass that I need to ask for? Thanks!