That's the Tubelab Simple SE that'll run EL-34 thru KT-88 single-ended. George sells you the board, cheap, and his website borders on OCD detail for the build. Anyone over the age of 6 can build this.

I traded some caps for a pair of Svetlana 6550s and they sound darn good putting out about 5 watts. One of them, or perhaps one half of the 12AT7 is a little weak so I'm having imaging problems but no big deal. The 4Pis really like this amp, it's punchy, dynamic and the highs are a litle less detailed/aggressive than the 45.

Feeling better lately for those who asked; it turns out I'm the drug side-effect poster boy and it's been really hard to find the right brew for my delicate condition.

I've prescribed one of these for my newly arrived second childhood and expect to get aboard sometime in July:

Cruising the Blue Ridge Parkway on my T-100, can't wait!