Having just received my Toshiba CRT back from having yet another tube fitted I've noticed that it now has a LG/Philips tube fitted. Is this a good thing? The geometry is still out with a obvious bow across and down one side but what's more alarming/annoying is the top of the picture jumps up a set of pixels half way across the screen giving a step appearance. Does anybody know what is causing this? I will contact the service engineers again but I would like to be armed with some of my owm answers and not blinded with science by them given their track record to date.