Marshall JCM 800 1959 - Hermansson Amplification

I&installed a tube buffered loop and modified this Marshall JCM 800 1959. It&a smaller mod since the main PCB is still there and the power amp is almost untouched, but the change in tone, gain, dynamic response and feeling is huge! I&playing a Greco EGF 1000 with Seymour duncan JB + 59 straight into the amp and running a G major II in the loop for some delays. The cab is a Malmberg 4x12 with old Celestion Greenbacks.