I have a Jupiter-9 with a Kiev/Contax RF mount. I'd like to adapt it to my GH4 but have found conflicting information about the adaptability of this lens. I've seen recommendations of taking the mount off a Kiev 4 camera to adapt the Jupiter 8, but no mention of the Jupiter 9. There are recommendations to get a Contax RF/Nikon-S adapted, so I got one. However the inner (rangefinder) flange of the J9, shown above, gets pressed by my Contax RF adapter to the point where the focus ring won't turn. Since I have no plans to use this lens on a rangefinder camera, can I remove the flange without impacting lens' functionality?