Color Adjustments

[VA561]

I recently posted a convergence question and received some excellent advice. I have another question about the same tv, a 1960 rca color roundie, the "Randolph" with a ct-11 chassis. I have completed my purity and convergence setup. Everything went well with the exception of just a very light bit of a pinkish color in the top left corner when watching a black and white show. Most people would probably not pay attention to it but since I was the one who did the conversion adjustments, I couldn't help but notice. My question is this; can anyone tell me the procedure for setting the blue, green and red screen controls? Also there is a kine bias control. Are these controls set to personal preference or is there a procedure in setting these controls.They are easily accessible from the rear without having to take the back cover off. Again they are marked red screen, green screen, blue screen and kine bias. I moved these when performing the convergence. Any adjustment tips would be appreciated.