Quick question for the pros out there. My previous shower (installed in the 90s) had full length fiberglass panels adhered to the drywall behind it. I am planning to replace these and the drywall behind them. I plan to use cement board in the main shower area, but have a question on where to put the seams between the cement board and the drywall. Should this seam be as close to the end of the new tile installation as possible, or can I place the last tile over this seam?