How to Un-Mod Fender Tube Guitar amps Showman 6L6 D-lab electronics

This nice Blackface arrived for Un-Modding after another shop installed updates. The owner was not happy with the sound, so contacted me via Facebook for advice. I told him, send it to me and I will put the jewel back to stock configuration. The job took approx 6 hours to complete. Now the amp performs properly. Best thing to do with these vintage amps is, try to keep them stock, maintain their value, enjoy the design as intended. Sure, it's always OK to reduce noise or hum with updated components, but please respect the initial engineered purpose. Thanks all for sticking with D-Lab. I have more ideas than time. TD