We generally rig our deco and stage regs the same way, and there is nothing visually distinguishing them. Do you have dedicated deco regs that you only use with O2 or EAN50 and dedicated stage regs that you only use with your stage bottles (e.g., EAN32), and if so, how do you distinguish them? Or are you not bothered by interchanging them between deco and stage use if all receive O2-compatible service at normal intervals?