Just the thread I needed. Looking to do the exact same thing for my 93gal cube tank. I was debating bulkheads or glass but the argument of the fact that a glass patch just has less variables to fail sold me on going the glass route.
When you say reseal, did you just remove the beads of silicone from the inside of the tank leaving the silicone between the panels and reapply new silicone? Or did you actually take all the pieces apart and apply new silicone in between each panel of glass? As stated above, I'm looking to remove an old overflow and I'm sure I'll need to reseal the tank as well.