Robert Smith Clever idea that is adaptable to a variety of railings. My concern is the ease of release at the top of the staircase. For people with compromised balance, standing at the top of the stairs trying to release the cane will put them in a precarious position. As you work on your design, imagine the person in your user journey (#6) has had a stroke and is unable to use his left arm. This is certainly something you can assess with your prototype during the feedback phase and modify as needed. Great user journey - very clear and well thought out.