Hydrostatic weighing - anyone done it?

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As far as I can tell, no one in my town does hydrostatic weighing. One of the machines is coming to a town that's about 1.5 hours away and I'm wondering if it is worth the drive. It costs about $50 which seems reasonable enough. I think of myself as big-boned, but I would love to know if that is true :smile: or not :ohwell:

Whaddya think?