If you are willing to accept the possbility of electrocution I might suggest opening up your set to see if there's any controls hidden inside. I got a used TV and the picture was dying, but after I popped it open I realized the bastards had hidden all the good shit inside! Hue adjustment, RGB gain, focus, all sorts of stuff all on little pots you adjust with a screwdriver! (in olden times I remember these being external!) After tweaking the knobs (a mirror helps so you can see what you're doing) I got an excellent image out of it. Natural flesh tones, great contrast, sharp, no blooming colors, looks awesome.
Of course, you should exhaust all the user-adjustable parameters on the set first. And be aware of how the software and hardware controls interact with each other. That way you can make sure there's enough wiggle room on the software controls for fine tuning. You want to get the hardware in the ballpark and then take it the rest of the way with the onscreen adjustments. And again, that tube can kill you so just be aware of where your limbs are at all times and use insulated tools. Yeah, there's an official method for discharging the tube for maximum safety, but how the hell can you adjust the picture with it off?
