Here's another one of MicTester's creation/adaptions. The Hot Silicon Tonebender is based on the classic SolaSound Tonebender Professional Mk II, but with silicon transistors and an added tone stack. Pretty much any medium to high gain transistors will work, so socket and try a few different ones out (BC109, 2N5088, MPSA18, etc).
This is a library of perfboard and single-sided PCB effect layouts for guitar and bass. I'm not an electrical engineer by any stretch of the imagination, just a DIY'er who likes drawing layouts. It is meant for the hobbyist (so commercial use of any of these layout is not allowed without permission) and as a way to give back to the online DIY community.