Nice idea and will full test tomorrow, for now just at install stage. Can be compatible with sj2000 cam by changing the camera mount with one supplied with the sj2000 cam.
Remember to screw the arm mount to the slot in clip before adding to shoulder mount. The plastic is very stiff and had to use two flathead screwdriver bits to be able to remove the clip from shoulder mounting.
Hope that makes sense, can supply pics and maybe a vid on sunday if needed.
Great idea amd very pleased!