I'm having big problems with the large white pots for width adjustments. The one that you can only use the plastic Radio shack tool to turn. I'm only able to get the green to turn and the blue and red appear to have something missing or broken inside of them. It can't be that the tool isn't grabbing because on the green it's very tight and can actually be hard to pull out and in the red and blue it seems like I can push the tool a little further down but it doesn't grab anything. This is causing me a big headache because. It leaves me with very little adjustment and the red is a ways off. Any suggestions? If I make some serious compromises on raster size and things like that I can get a decent convergence with just using the regular convergence pots but no matter what eventually I want more room to fine tune and get a brighter picture. As always thanks for listening.