CJ LP140M 6922 tubes

On each channel, are all 3 (6922) needing to be fully matched or only the 2 side tubes need to be matched? Appreciate all your feedback....
The small signal tubes (6922) do not need to be matched. And because cj amps have a bias adjustment the larger power tubes also do not need to be matched. I would ask cj if it were me and not necessarily depend on the answers you receive here.