So I just picked up a kayfun Lite Plus Black Edition RBA and the tip is very loose. I also have a authentic kayfun Lite Plus V2 authentic and Russian 91 and both these have a tight fitting tip. That said, out of my tip collection the only tip that fits tight on the black edition is the tip from the authentic kayfun Lite Plus V2. So, does anyone have any recommendations on a tight fitting replacement tip for the black edition?