Happy to report that swapping the Horiz. Mult. 6SL7 tube did the trick!!!! Watching the set going on an hour and a half now. Solid! Did take me a bit to get the Horiz lock, horiz hold and horiz linearity adjustments to all jive, but looks pretty decent now.
http://youtu.be/XyXfRXduqGM
http://youtu.be/qD1ZXij6wvE
NOW IT'S TIME TO STOCK THE BAR!!!!! Thanks again for all the advice and help.