I've got a deck that has limited dimensions (not too limited, and there are still options), and I am slightly too small for a used unit that I am interested in. The hand railing on the deck will be cut either way to access the full ~90" of the decking, but I was curious if I can even extend a little bit past the decking? I know that with something like the "forever floor" on Arctic Spas I wouldn't likely have an issue hanging 5-10" over the edge of the decking on a tub that is like 100" total in that dimension, but what about most tubs? What is the construction of the bottom of most hot tubs, and is it ridiculous to consider a slight overhang?