I'm having a similar problem actually, the difference in tension at different points in the chainring's rotation is quite alarming. I've just replaced the chainring so now I have Dura Ace (road) ring and Dura Ace sprocket but it still seems impossible to find a position that gives me a high enough tension at the loose spots without binding. Tried the Sheldon spanner tap technique etc
I'm having a similar problem actually, the difference in tension at different points in the chainring's rotation is quite alarming. I've just replaced the chainring so now I have Dura Ace (road) ring and Dura Ace sprocket but it still seems impossible to find a position that gives me a high enough tension at the loose spots without binding. Tried the Sheldon spanner tap technique etc