@ Book effects Great to see an Aussie getting in on the Valve-based pedal act, I've done some building of Valve-based pedals in the past, it can be pretty tricky getting them to sound right, but it can be done, one of the Valve-based pedals I have made is one called a Baja Real Tube Overdrive, it was designed by a bloke who lives in Christchurch new Zealand, I know him personally, he runs an electronics repair shop called Baja Electronics, the Baja Real Tube Overdrive is similar to the BK Butler Tube Driver, but has a simple one-knob tone-control which gives the tone a bit more midrange compared to the Tube Driver's two-knob E.Q. circuit, which gives a somewhat scooped-midrange tone.