So... I found some perfboard kicking about in my house that happened to be the exact size (more or less a few mm) for my power supply board. I decided to work on a template to practice making a layout for the real board.
On the right is what will be the DC Filament Circuit, and on the left is the Full Wave Rectifier. The Diodes in the rectifier are spares I got a long time ago and don't fully trust, so they are in there just for an idea of how the board will end up looking.
The board should also include the bias circuit and the reference for the AC Heater Elevation. Floating the AC filament supply on a reference voltage can help a little with heater hum but in this build I'm using it mainly to keep the cathode followers in the circuit healthier for longer.