I rescued this set from the trash, got it to the point where it powers up and shows a dim, blurry image. It's a D-12 chassis. Tubes should all be good in it, though I don't know about the CRT. I just bit off a bit more then I can chew with this set. Not having the proper equipment to work on it this is one I'm going to have to let go.
So, if you're in the Detroit area or willing to drive there you can have this set for free. I can even help you load it.
I'll be holding onto the TV until the new year. If there are no takers by then it's getting scrapped.