I’ve got some walking poles, to save my joints – and they work very well. But each one also has the daftest gadget you ever saw – a tiny compass wedged into the top of the handle. It might be useful in some circumstances, if it worked. But it’s placed right on top of a steel screw – so ‘north’ follows the pole round, whichever way you turn it. It’s probably worse than useless, because you might believe it.