Tube Pilot Overdrive : Natural tube overdrive sound

Great overdrive, but in my case I needed to replace tube. Mine has come with Bugera 12AX7C tube, wich has to much highs and brightnes for my taste and amp. In front of some amps this may be ok, but my tube amp has JJ ECC83S preamp tubes and the diference in coloring the sound is to much. I have replaced Bugera tube in pedal with JJ 12AY7 (for warmer sound and less gain), and adjusted trim pot (inside pedal) to minimum. For the same original amount of gain, I would chose JJ ECC83S or JJ E83CC (I'm thinking about buying one more:)). Now is almost perfect transparent overdrive, with only slight low end sound lose when it is ON. This gives me possibility to switch pedal ON when I need more natural tube overdrive without sound volume incrase. Perfect!