I have an E650 Blackmore that was modded to take el34 (I don’t know what was done - it came used like that). I guess this makes it pretty similar to an E651 Artist model. Anyway, I’m gonna sell it so I pulled the NOS SED Winged C and put in in JJ EL34L. Does Engl bias at 70%? This is my current reading on my Eurotubes bias tester. I’m pretty new to this - what bias do you recommend?