Fwiw, I am finally done. After weeks of moving things, swapping Cables, measuring, breaking in caps, swearing and self doubt, I have a sound that I am ecstatic about. Finally have bass, midrange, and crystal clear treble, imaging, depth, pinpoint instrument placement and musicality. I can't drag myself away and keep going through my music collection hearing details and experiencing things I have not before.
I congratulate Paul on his design but also did major modifications from the start. What I have learned is that every little detail makes a difference. But you will have to figure that out for yourself. If you do build a kaiju and want suggestions let me know.
I do highly recommend the Eml's tubes without reservation. They seem to keep delivering more and more as I make other small improvements. Great amp, fun project, this is it for awhile really . . .