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Get the engineers to hang their lives on them for testing without a backup. Engineers can do amazing things, then they can screw them up mighty well, too. The old Tacoma Narrows bridge/ Galloping Gertie was a proven design, I believe, but it didn't look as they wanted, and they changed the...

Sign me up.

I bet they get Generation 3 right, or 4, or... In any case, it just life support, so no worries. Mick, I bet it has to be a huge improvement over a Blake's. A VT with HitchClimber pulley is really good for DdRT, IMO. I'd still opt for a HitchHiker with a pulley, at this point.

No I don't have one. Conceptually, great. Cracks in metal. No bueno. I would like to see one levered over sideways, as could happen dynamically in a fall at the wrong place. Enough danger and reason for concern in our work without using things that are repeatedly doing things they shouldn't. I'm...

One part of the equation-- Will it fail??, another part of the equation-- Do I wonder (distraction) if it might fail while I'm suspended from it 80' above a driveway?.

You could wait until someone is injured or dead. Just my .02. If you go with the hitchhiker, the right pulley below makes it tend better, per David (DMc, if think is the screen name). It doesn't tend as well as a ZZ, I'm sure. Petzl doesn't endorse SRT, so any employee getting hurt using it...