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an MTC Master Tone Circuit, made for me by John "Dawk" Stillwell, of "Dawk Sound Limited" back in May of 2007. Mr. Stillwell worked with Deep Purple as a technician as well as working with Ritchie Blackmore's guitar sound during parts of the 1970's and 80's. In my reading of the history of Mr. Stillwell, Blackmore's gear was modified by him including his Marshall Majors and his Fender Stratocasters. Dawk designed the Master Tone Circuit that was installed in Blackmore's guitars.