Schematics
This is the scheme I am going to use for the build:

Click on the picture for full size (.pdf)


Full credit goes out to Mark Huss, for the brilliant scheme! And thanks do diffent fora for the mods (given in cyan).
Lay-outs - Chassis
To make the chassis from a sheet of zinc I used this lay-out:

 


The lay-out for the top of the amplifier will look like this:

Full image available in .pdf and as conceptdraw file


The front will look like this:

Full image available in .pdf and as conceptdraw file


And for the back I drew this:

Full image available in .pdf and as conceptdraw file


Lay-outs - PTP turret board
For a good line out for the turrets on the board I made this lay-out:

Full image available in .pdf and as conceptdraw file