My colour system didn't match the ceriatone diag. So use it where you need a solid core wire like the the pot buss/ rear jacks.
The heater wires when twisted are supposed to reduce noise. Some solid wire here would also help the build. Also read some post on running the heaters like a fender not the Marshall style that nik does.
A tip is to build the whole pot buss reversed in the chassis then install it.
this link may help you. It's for a d-lite but a similar process.
http://thenormster.com/DumbleLite/BuildersGuide/D-Lite%20Assembly%20Guide.htm