Hi: has anyone had any experience having a tub removed and a shower stall put in so that there is no space left (ie the shower stall fits in exactly where the tub was taken out)? Jack is finding it more and more difficult to get in and out of the tub (he sits on a chair in the tub) and even with the grab bars he is having trouble. Any ideas would be appreciated. Thank you. Jack and Joan Martin, Oshawa, Ontario, Canada