Parsing the Supertex LR8N3 HV regulator

I put up the wrong file before: Here's the PSRR with and without bypass (10uF) on the adjust pin:


and a bode plot. Solid red line is adj pin bypassed with 10u. At the zero gain crossing there appears to be 57 deg phase margin:

The Bode plot is what, from the unregulated HV input to the output? From the ADJ-pin network ground pin to the output?

Given that so many folks add outboard pass transistors to the LR8, using it merely as a control element, what would be the best LR8 Bode plot info to use in analyzing the loop stability and output-impedance reactive properties in that situation?