Yup, looks like it should work. I do have a question though, do you really need to redirect the original request or can you simply pass it through to the correct pool of servers? This probably depends on whether or not the server returns relative or absolute uri's in it's responses or even some other application dependent thing. The nice thing about not redirecting is that the client browser will maintain the original uri and hence be unable to bookmark the endpoint server directly. However, I realize that may not be feasible with your situation and this does seem like a pretty good way to make sure the client has at least gone through the original vip.
Good luck.
Nimbostratus