PROGRESS! (sort of. more on that farther down) I have it built, for the most part. But, what I am getting isn't the same as the sims in LTspice. Each of the AC secondaries measures, no load, at 24.6vac. After the rectifier, I have +/- 33.4vdc to be used for the +/- 15vdc rails and 100.4vdc to be used on the +48vdc rail. Of course this is all rms AC voltage. By the numbers, these are correct DC voltages. 24.6 x 1.4 - the voltage drop from the diodes for the +/-15vdc rails and 24.6 x 3 x 1.4 - the voltage drop from the diodes for the =48vdc rail.
The 100.4vdc going into the LM317HV is getting real close to the in/out voltage differential of 60vdc. 108vdc being max. Will this be a problem?
I bad part is that I screwed up while testing the outputs and the 48vdc wire coming out touched, I believe, ground and fried the LM317HV. All I am getting now is 1.2vdc out (ref v.) Looks like I need to place another order to Mouser. At least I can now get proper connectors going from the PSU to the mixer.
Attached is a pic of the almost complete PSU.