Building my first full tile shower and I just heard (from this forum) about the trick of notching the studs to create clearance for the shower membrane folds. I didn’t do this and I’m kinda Leary about doing this on exterior load bearing walls in an old house. Would there be a problem if I put up a 1/4” Durock board with a rectangle notched out of the corners. And then put a second full sheet of 1/4” durock over top bonded together with thin set? Essentially creating a little pocket for the membrane. It would be a very small area in each corner that wouldn’t be full strength. I could even pack thinset on top of the folds to give the top sheet some strength in that area.