Initial design is off to OSHPark. This design is 4 layers, but kinda breaks the rules in having what is essentially 3 signal layers. The ground plane is solid, but there are many high current traces, so they are actually placed on the bottom layer instead of a split internal VCC layer. This allows the design to be functional and fit within the 4 layer stack for OSHPark. The analog ground is somewhat isolated, though there may be issues with some near traces. The inductor is well isolated from traces.