Alternative gun stock for HTC Vive (V2.1)

This is a different kind of setup than most. I call it "The Homewrecker". The trigger hand controller is clamped in place while the front controller is free and just used to support the barrel.

Advantages over a [bottom mount type](https://www.thingiverse.com/thing:2763031) stock: *faster* access to your grenades, comms, and reloading since you never fumble around trying to stick your controllers back into the cups.

**Disadvantages: the right controller is locked in position, so when you