The DistMax is kind of a high gain preamp in pedal shape, producing rich harmonics and massive gain. High Gain distortion with 3-band-eq, volume and gain controls.
The pcb dimensions: 55x55 mm. It is professionally made, all holes drilled including silk screen.
You can find a partlist, schematic and layouts here: Documents: The Distmax docs.
This project is also available as a complete kit!