Hey guys. quick question here regarding grayscale tracking on my Sony LCD RPTV. I'm having a little difficulty eliminating a hitch in BLUE between 40-60 IRE. i've been slowly adjusting CUTS for the low end & DRVS for the high end & whenever i try to fix the increase in BLUE at the low end, the higher end grayscale doesn't have enough BLUE. any other service menu items i can try to adjust to help this situation?

Thanks guys!!!
Carmine.