Finally received my new boards from oshpark and started putting together the stage 1 power supply.

Stage 1 is based around the LT3472 and converts the 5V raspberry pi rail into 2 +/- 8 V rail. Noticed an issue when I put it together:

1. The negative rail was around -6.2V rather than -8V. Looking closer at the datasheet it looks like I misread the equation. Should have set the negative feedback pin to 320k instead of 270k.
2. Fortunately the Stage 2 drop out voltage of the LT3093 is only around 190mV so there is plenty of headroom between the -6.2V and the final -5V rail.

Did a simple resistive load testing to validate things were still stable up to the expected current draw. The total power draw was a bit higher than expected but wasn’t too crazy to cause too much concern.