Thanks for the replies everybody! The bed design is under control - it'll be an interesting project, and has had a lot of research / iterative development to get it to this stage. Some of the insights are very helpful here - getting a better idea of the way these things are used (whilst doing a million and one other tasks) will really help; and the way the existing products are failing is equally as useful. Would preset position buttons be useful, or more of an annoyance (i.e. supine / CPR, fowlers (or semi / high fowlers), bed exit etc.)? Thanks again for the replies - all comments are being noted!