Started life as a vintage Ibanez TS808 Tubescreamer circuit...I made a few modifications to give it a tighter bottom end, as well as  alot more clarity and tonal character.  The Tone knob really reacts all the way from 1 to 10.  I use all high quality components, and hand build each one from start to finish.  It's not a big gain monster, but a sweet-n-subtle overdrive.