Has anyone made an attempt at..

[UnlockD]

building a "Spring loaded circular tension tool?"
I've read that they reduce 'feel', and are quite awkward to handle, but I imagine that'd be the case mostly on padlocks, not deadlocks.
That aside, if anyone has created one, or knows where to find the patent, could you be so kind as to enlighten me?
Thanks

[Eyes_Only]

I have a commercially made version and I never use it. You do indeed loose a lot of feedback on the tension side. I got it for work when picking locks that is right next to a wall or a door jamb doesn't allow a regular "L" shaped wrenches free movement but those issues were solved when I got the Peterson pry bar top tension wrench.

[ChemicalRobot]

Yeah I don't own one but I hear they are sort of just a novelty item.