When I had my last back surgery I had a drilled split bone with a rubber stopper on the end. I had a cool round knob on top. The last time I went in to see the doctor there was a kid there having the same procedure. he went nuts over it so I gave it to him. Have your brother-in-law build one. Takes about an hour to build. Cam will be too heavey. You won't be able to lift more than it takes to piss for a while. Keep it light. If he can't get it done email me. I will try and scrouge one up . I can build it quick.TP