I have a Cayin A50T-ii and recently had them (Cayin) send me a matched set of Gold Lion KT-77 tubes to replace the factory EL34 tubes. I switched the amp over to KT-88 Mode, installed the KT-77 set in the order it was marked and set about to Bias Adjustments per their suggested setting of .30v. The problem I am running into is that the Left Channel - Tubes(V1 + V2) will only come up to .28v + .26v respectively, at max. adjustment. So. My question is : Should I bring all the tubes to the same common level of .26v? Or, should I be running as close or at the reccommended .30v for all the tubes that will achieve it and just leave the ones that won't at their max settings? Thanks in advance for any helpful tips or knowledge. I know some stuff. But nothing about this sort of thing.