New wrench derivation FTC FreeXion

The wrenches keep getting more complicated, but I wonder if they're actually getting better? That looks like you virtually require a proprietary tether. I have a piece of ash on the ZK1. I commented on the ISC wrench that it might be useful to change settings on the fly, but is that really useful in practice? There's something to be said for sticking it on the rope, and getting on with life.
 
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