SSR01 PCB's for free
More instructions can be found here.
The super regulator pcb you can see on the picture may be one of the best in the world. Measurements are pointing in this direction and one of the reasones for this is the multilayer pcb. With four layers of copper I can get a perfect grounding scheme and also a good shielding against RF interference. The other good thing using four layers is that I can add features without sacrificing any performance.