How far away from the wall is the tub located? - I have 36"x 70" alcove. I can leave lots of room behind the tub on the longer side where the taps will be but am worried if there would be enough room at the sides of the tub. The tub I am looking at is a free standing oval tub that is 66" long. Is 2" on either end enough? I could get a Swiffer around it.