@jaymark, doing something similar this weekend. KT120 mono tube amps rotated out (a rest) for my now upgraded Pass/Forte Class A 50w solid state amp. Was 200w Class AB, now full Class A 50w operation with several upgrades, main power caps, rectifiers, Cardas binding posts, wiring, many spades eliminated, all direct solder now. Whew. Like you, using my upgraded Cary 6SN7 triode tube preamp to drive these amps. Speakers are scratch custom design by me, yet realizing once again a nicely upgraded amp helps bring out the best in speakers. Everything matters at every layer. :)