@rora_borealis @hannah And a brilliant one. Stick two 10 ton narrowboats on either lift, two 0.1 ton kayaks, or 10 tons on one side and 0.1 tons on the others, and it remains balanced (cos displacement)...and still only uses the power consumption of the average toaster.
@_thegeoff @hannah The more I read, the more impressed I am with this engineering. Definitely some out-of-the-box thinking!