Sir Jo, and kapal ng copper foil kaya ginamitan ng CNC. Are you going to install Tubes directly to it? This can be pass as "Automotive Specs"
Sir Jun, yup been experimenting with different boards. The best with CNC is you can have the unused foil as ground plane and most of all it reinforces the whole board. It's fully automated and does everything for you with deadly precision. It even drills the holes.
This one I will install tubes on, it's a personal build for the Aikido festival. The JD Labs Baby T tube preamp series now uses the same process for it's boards too.