Update...put a 5751 tube in the phase inverter slot and really like the results. Now the amp has the "right" amount of breakup for my tastes. Still cleans up when turning down volume on the guitar.
Hey! Good to see you here. I'm glad the 5751 is working out for you. I will second that advice on the EF86. A good quality NOS tube will sound and perform better. You should get years of good service from it.