Almost A Power Supply

I'm making very slow progress on my big power supply, but it is working.
I need to rethink the board layout and get a power control board in the build pipeline so I can stop using the HP. It also helps when setting the relay trip points if you have the control installed.
The trip points are somewhat hard to guesstimate, and heavier loads sometimes interfere with ranging.
So far, ranging basically works, and the predriver most definitely works as desired, I'm really happy that worked, I was worried somewhat that it wasn't going to work as well as it does.
Schematics will be shared later, and I would like to make a tiny one to introduce builders to this kind of build.