In the absence of a metal box, cardboard will do..
![Image](http://bestnetworx.com/uploader/files/371/OLC_SLO_C_1.jpg)
![Image](http://bestnetworx.com/uploader/files/371/OLC_SLO_C_2.jpg)
Trim pots adjusted to give around 4.5v on the drain (D) of the FET
![Image](http://bestnetworx.com/uploader/files/371/OLC_SLO_C_3.jpg)
All those caps showing u22 instead of 223...
![Image](http://bestnetworx.com/uploader/files/371/OLC_SLO_C_4.jpg)
Critical ones in the tone stack replaced by 223 to get bass control working
![Image](http://bestnetworx.com/uploader/files/371/OLC_SLO_C_5.jpg)
I'm not sure about this design.
![Image](http://bestnetworx.com/uploader/files/371/OLC_SLO_C_6.jpg)
The trim pots that adjust the drain current and voltage also affect the gain, so not that much like the Soldano valve amp it's meant to be based on.