Wheelchairs are rarely as comfortable as you'd like. You either have to settle for a generic design or wait ages for a custom model that might still be a little awkward. However, London design firm Layer might have a better way: it's unveiling Go, a prototype wheelchair that could be easier to live with. The design has manufacturers scanning your body so that they can 3D-print seats and footrests that match your exact dimensions. It'd be more comfortable, of course, but it'd also account for your weight and create an ideal center of gravity that reduces the chances of tipping over or sliding.