Well, I had a setback. I accidentally bumped the horizontal osc coil and it broke off and rolled on the floor and unspooled a bunch of wire. The plastic tube is pretty brittle and crumbling, but obviously I should have taken it off to work on the board. I looked for a replacement and no luck yet. Somebody on ARF was working on a similar set back in Feb. and had to replace the coil too and found one, so I'll just have to wait until another turns up. The GE part number is ET36X664, Merit TV-250, or Miller 6352, unless somebody knows of another suitable replacement.