Remodeling my masterbathroom and we need to buy a tub soon. House is on a slab so we do not want to move the current plumbing. We removed a drop-in style and want to buy a free standing. The drain location is giving us some problems... it is located about 18" away from the wall, where one end of the bathtub will be. But the tubs we are looking at almost all have center drains. Is there a drain that will strech all the way to the center of a tub and drain back? Also, what type of drain plug is comfortable to sit on?