I first changed OT and installed a choke. Then I changed filter caps from 100ufx2 plate caps to 50uf and screen cap was 100uf thats a 47uf now. Then I changed C2 from a .0047uf to a .0022uf.I removed C36/37. I removed R15/16/17/18 neg bias resistors and just connect pin 1 to pin 8 on the power tubes. I changed screen resistors from 700ohm to 1kohm like they should be. I installed a 25 watt 100ohm resistor right after bridge rectifier to give it some "sag" along with the lower valued filter caps. I think that was it for now.