Well i had an idea not to crazy imo. I planned to upgrade my 75g tank to a same size but sliding glass front, so i though why not now. I plan on get a dremil tool and make a outline of thin wood as a guide to cut a panel of the glass out. Then attach a E track for sliding glass door. The glass is 3/8 thick. I will pratice on 2 ten gallons and also get a small sheet of 3/8 glass. I have drilled tanks before including this one. i know reef keepers use this tool for corals and for drilling the tank(i havn't used this tool before). Worse come to worse it shatters and i complety take out the front panel of glass, and just make like the sticky uptop. Which brand should i go with. thanks