Hello, I'm installing a drop in tub in a framed in tub surround. I'm getting ready to tile the tub surround and I'm wondering, do I need to put in an access panel? It's not a jacuzzi tub, so there is no electrical or motor that will need to be accessed. The tub will be sitting on a cement slab. Once the plumbing is hooked up and checked for leakage, I don't see a need for future access.