bath's in this old house have 2-slot receptacles built into light fixtures over mirrors. wall to right of vanity contains pocketdoor. can cut gfi into wall to left of vanity in guest bath but it won't be within 3 feet of sink as sec 210-52d requires. will be about 6' from edge of sink (very wide vanity). will this pass? in m bath, wall to left of vanity is back exterior wall of house & wall has a window taking up most of width of wall. wall to right of mirror is teed into on backside by pocketdoor of g bath. can i place gfi receptacle in m bath over mirror? could i use existing light fixture/receptacle but feed it off gfi in g bath?