Replacement tubes 2/90/2

After a full weekend with the 2/90/2 and Axe FX iii and two 412 cabs. I am in heaven with this power amp.
Question as I order some spare tubes for down the road.

I assume the manual is referring to Electro Harmonix for the KT88 tubes where it says EH?

I have quite a few brand new Mesa Boogie brand 12AX7s. I assume those are fine for the two 12ax7 tubes?

Does it matter what brand for the 12AU7s? I assume any reputable brand will do? Not sure why it refers to China tubes in the manual?

Please advise. Also still waiting for BIAS instructions, pot locations and starting values for the power tubes.

Thank you for your time.

Any 12ax7 and 12au7 should do, but the factory recommendations are always on point. The Chinese tubes are as good as anything out there.

I really like the Tube Amp Doctor Redbase KT88 matched quad. I have used the Redbase series in other Fryette amps and they have been great. Mesa tubes also work well.

Vacuum Tube - KT88-STR, Redbase, Tube Amp Doctor | Antique Electronic Supply (tubesandmore.com)

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