Nice to see the thread come alive again.
The remote volume pot has been scratchy from day one for my new 2023 Cabernet. If I move it quickly up and down a few times by hand it stops making the noise using the remote until the next time it gets turned off then on. Doesn’t seem to be an issue for me unless it starts progressing.
I have had a handful of NOS tubes become very noisy and/or then go dead. Common in my tube experience. I have not found a new 6SN7 that can match the good NOS tubes. Some like the Elite Linlai E-6SN7. I tried a pair and did not care for them. Very detailed and too solid state sounding and just didn’t pull me into the music. I prefer the warm full encompassing sound. A few fav’s are Raytheon ‘50’s 6F8G flat plates, Melz ‘50’s 6SN8, Sylvania ‘50’s 6SN7 GTA military shorty, heavy chrome down side with T-plates.

