Now, that's a workshop, John. Looks like someone works in it. d;^)
I have a bench vise bolted to my work bench too. I use it for rough work mostly like getting the stave to floor tiller stage; removing bark and sapwood, removing excess belly wood and shaping up the sides of the stave. After that I use my bowyers bench for tillering.
When I use Eric's gizmo I clamp the stave/bow handle in the bench vise.