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Yeah looks pretty similar. I've had that Fouriers mount a year or so, probably longer actually... It's been solid, although it sounds like they get the bolts from the same place as the lifeline one, they're not the best. Added bonus with the Fouriers mount is the metal shims for thinner bars, I put them to use for my Brompton gopro mount.
Good point about the single bolt being the weak point, I'll stick with plastic unless it's obviously shit. The camera isn't very heavy and the gopro's been on there for a year or two with no issues...
Nearly identical to the (currently cheaper) Wiggle own brand one (https://goo.gl/EG2wCB). Less material on the boom of the Wiggle one. Lighter/little weaker/little less stiff?
Most likely to fail the single screw that attaches the boom to the bar clamp with X no. devices and a big jolt. Bendy plastic 2-1 mount might help dissipate such a shock, whereas an alu one would transfer more force along the boom to the weakest point.