I'm going to meet Mr. Carver in a couple of weeks. He invited me to his friends house for a listening session. Can't wait. He insists I bring some of my own gear to play with. I told him I only have average vintage tube stuff, he didn't seem to mind. Seems like a heck of a mench.
If you can bring some McIntosh tube stuff and ask him how he would modify it. I would be curious....