Here's a Catalinbread RAH ('Royal Albert Hall') overdrive pedal clone that I built recently. It's completely hand made & wired using hi-temp telflon coated silverplated wire, high quality film capacitors, metal film resistors, a true bypass and switchcraft jacks. This one will not fit a 9V battery because I wanted the DC jack (which accepts a hot spot or a boss 2.1mm AC adapter) to be on the top of the pedal. This pedal was designed to capture Jimmy Page's Hi-Watt overdriven tone on the Led Zepplin's 1970 performance at the Royal Albert Hall. It sounds great with both guitars and basses, and I would call it a moderate overdrive. Featuring a complete treble, mids and bass tone stack, along with a gain and master volume, it's a very dynamic pedal, amp-like in it's response and cleans up extremely well with a guitar or bass's volume control. I am only offering one of these since I only built two of them and I'm keeping one for myself.