titansfan2104,
Years ago, I used something similar to that. It was called and Eppard's Lounge (sp?). The vest was great on flat terrain, but as soon as you put it on uneven terrain, it would hit your back at an awkard angle, making it extremely uncomfortable to sit. I stopped using it, as a lot of times the terrain I was in would not be even.
Just wanted to let you know that there are drawbacks to that system, and that is why we chose not to add something like that.
Mike Dillon