puddlefish, my home PT person showed me how to step over the tubside to get into the shower,
she had me stand next to the tub, then flex my leg closest to the tub back, like i was trying to
kick my butt with my foot, and over the side into the tub, then do the same with the other leg...
have you tried that approach? are you doing that exercise as part of your PT? just
a thought...
(and yes, i may be a bit taller than you (6'-1"), actually doc made me 3/4 inch taller than i was!)