PCIe3 switch project, part 2, the humble beginnings of a power circuit

Both switch chips have 4 power inputs:
• high current 0.9v core
• medium current 0.9v aux
• low current 1.8v digital i/o
• low current 1.8v analog i/o

There are several ways you could do this, but given the space constraints, current limits of breadboarding, and available adapters, I chose a 4-channel, 8-phase buck converter with integrated FETs. Configured as:
• 0.9V at 6A
• 0.9V at 3A
• 1.8V at 1.5A
• 1.8V at 1.5A
Required components: four inductors, config and feedback resistors, input/output caps.

The top pins will be soldered, bottom will use wire wrap, any ground pins will be committed to the ground plane with copper washers and solder

posts ready to accept wire wrap "traces"

It's difficult to get a good shot with a phone camera /while/ applying the large amount of force needed to push these in, but I tried

preliminary functional schematic for power. Input power comes from the PCIe 12v

Cat tax