Last night I noticed that my mouse pointer had a slight blue shadow so I decided to check the convergence. Using the Barco generated grid there was a slight sign of it not being perfect so I entered the guided set up and, standing 2 to 3 feet from the screen, proceded to converge. Some blocks needed minor tweaks and others were fine (pj was warmed up for an hour first). After adjustment I think the picture looked slightly sharper and the shadow had gone, although there was a slight red shadow at the very top of the screen when the mouse pointed was moved. I think I have done a reasonable job, but how well does the convergence need to be done, do the lines of the grid need to be completely on top of ach other, or can some leaway be tollerated? I found it almost impossible to get every line totally convereged. Do I need an expert in? It's been set up for 5 months but I don't think the picture was noticably bad before I did it and it is only very slightly better after. How often do other poeple converge, if ever. Am I wasting my time for these very small degrees of adjustment?