Lol. I'm just playing around with it in my head while I'm "working."You asked for the fanny pack! Personally I would never run a fanny pack... only "action satchels" for me.
I could see a way to combine the belt and the shoulder straps... but I can also imagine a lot of fiddle being introduced... trying to leave the belt on while taking the platform off...
Really, resting the platform on a fanny pack functions pretty well to take weight off your shoulders and onto your hips.