In reply to petesam:
Ah yes, good point - crampons were my DIY mindset at work, normal bindings sound like a much better idea. Can you genuinely get enough edge control without the ankle support? And realistically, it's going to destroy both ankles if you catch and edge right?
Agree that "snowboarding approach" is a complete contradiction (unless on a splitboard!), but it could be fun for normal Scottish climbing where there's no snow until about 600m - walk out, climb up, board down to the snow line, walk back home. Need to find me a very cheap snowboard to play around with.
Next thought: foldable skis? Create a ski with a hinge, locks straight with some kind of plate on the topsheet/somehow with the bindings: saves that issue of carrying 2metre planks on steep ground. One day perhaps...