Ive been playing with the idea of adding a shoulder strap on my polaroid. I wanted some input and feedback. Your contribution is appreciated. Im using a polaroid 110b with a graflox back. Shooting a range of 6x9 to instant film to 4x5 film. After shooting for a few hours my arm was killing me. So a strap came to mind. Im proposing the black rapid rs4 to be put on the tripod mount on the polaroid 110b. - is it a good idea to leave the camera folded out? Or leave the strap only when the camera is closed? (I am concerned about bending the frame.) any other concerns i did not consider?