Re: You use vintage tubes in your amp?
My '67 Fender Deluxe has all original glass (it sat in some dude's mom's closet for decades)... RCA, Telefunken, Bugle Boy, Mullard, etc
I have 2x Valvo-labeled Mullards (Blackburn) and 1x Mullard CV4004 in my JTM45 that have been going strong for 14 years.
About 14 years ago I bought up a bunch of current production 12AX7s (still have them)... Sovteks, JJs, EH's, Ei's, etc... none of them compare.
The only current production I would endorse are the EH 6CA7s.