We are making our son's bathroom wheelchair accessible. We are looking for an undermount sink, with least depth to make it possible for him to wheel his chair underneath and yet not to make the counter too high. He is only 5'8". So far we found a Kohler sink (Ladena) with water depth 4-5/8" and outer clearance of 8-1/8". Or, a drop in sink which we can make it flush to the counter top. Also, with a drain at the back, not in the center, so the pipes won't be in the way of the legs.
Any help would be greatly appreciated.