So the pan was installed last week for our shower. Prior to the plumber showing up, I plumbed all the walls with sister studs. When the plumbers left the tub was still covered. In fact the tub stayed covered until last night, when I needed to tape the tub off for redgard. Unfortunately, the pan is not set square in the alcove. I called the plumber this morning, and am waiting on a call back from them. Is there anything that can be done so that tile flange will be able to have tile laid on it without ripping everything out? Cannot build out a small section as the doors we are putting in are frameless with NO OUT OF PLUMB adjustment. Thank you in advance.