I'm remodeling a bathroom with the tub against the back wall. The old tub was 61", and the new tub is a standard 60". The walls around the tub will get CBU and tile. The tub is in place but I need to fur out the right hand wall an inch (lefthand tub). I'm look for ideas on how to best handle this. Everything I can think of is 3/4 or 1/2.