Marshall Bluesbreaker History File 2014-07-28 - Started History File. 2015-06-10 - Updated the modernized schematic so that R7 and C7 matches the layout order. 2018-09-12 - Added new PCB information with mods for KOT and Morning Glory. 2019-05-20 - Updated the original schematic diagram, the orange color on one of the VREF markers was missing and was fixed. 2019-07-02 - Updated KOT Mod Layout and Schematic diagrams to correct the Presence control placement. 2019-07-17 - Updated Modification file wording and updated the BOM & Instructionns to reflect combined Coupling caps and resistors (R8 and and C6) no more R7 and C7.