JDB:

I was hoping the adjustment was sort of a set it and forget it thing for most of these systems. I've not viewed a lot of 3 chip systems, maybe only 2-4 so my experience with them is very limited. I've never gone looking specifically for a convergence error on any of them, but I certainly never noticed a problem. How common is it to have a visible but not glaring amount of error on these guys in the field? After reading the link it seems like the adjustment is buried pretty deep, which would seem to indicate it is not a routine thing to touch. OTOH the poster didn't seem to understand the difference between an owners manual and a service manual, so his report might not be 100% accurate as to the innards of the beast.