Hi, I have the default ossc settings I just set it to line 5x. I think you should first try to get line 5x with ossc and tv without vp50 pro. With my tv I was able to get line 5x with ossc without problem. Then if you get the ossc in line 5x with tv then try it with vp50 pro combo. From what I read if your tv does not take in line 5x with ossc alone the max you came get with ossc+vp50 pro is 3x. The only real thing that made a difference with vp50 pro was disabling cadence on vp50 pro.