hello I read ur interesting listing on BLUE TAPE By chance we have 12x12 marble tiles and 12x12 ceramic tiles in our home and when my husband suggested i try to walk into the squares it became a little easier so I concur with your findings. I also saw this on an early TV show with a PD medica research section and it worked there as well. by the way i have problem getting to the stairs but NO PROBLEM getting up or down. More research should be done on this phenom. joyce tames [log in to unmask]