I've tried using golden reference HV supplies for the T2, but had some issues with negative rails as well as the current limiting when an issue occurs. I ended up reverting back to Kevin's original design.
I will spend some more time with this in the future. My current GR HV mini board include depletion mode MOSFETs for current limiting in front of the GR HV supply similar to Kevin's T2 design.
I'm also experimenting with a couple of ideas on how to enhance the current limiting on the GR HV (in case of a short), but need some more time for testing and $$$ for parts (... and a blast shield)