Design idea for the weight-conscious traveller: small-size weighing scales which clip, with calipers, to the top of a door frame, with a dangling handle. The scales pair via Bluetooth; you hang from the handle briefly; it records your weight. Mention my name in the patent!
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You could rig this up with a fishing scale and a pair of skyhooks (climbing gear).
Starting to look plausible now I've made it beyond the 70s Australian rock band...
