Here is a biggie of the SLOstortion from Wampler. I had just finished the layout when I realized that the schematic missed the boost section...
![](/images/smiley/smiley_teeth.gif)
...tracked down the boost schem and did a daughterboard that should be placed after the main circuit.
Schematic of main circuit
HEREAnd schematic of the boost section
HERENote that the C102 cap should be between 47pF and 100pF.
![](http://guitar-fx-layouts.238.s1.nabble.com/file/n41340/Wampler_SLOstortion.png)
And the boost scetion