No opinions or experience with eliminating the 100 uF electrolytics? I am going to use some shunt regulators which do not like to see a lot of C on their rails, neither do they need it.
In my Legoto II (with Supertex FETs) I just 0.1 uF films for decoupling with these regulators and the results are very good. Is there any reason I should not just go with the 0.1 uF already in place on the IVYIII and just omit the electrolytics?

Thanks for offering your opinion Russ. These regulators can be configured different ways to accommodate different circuits, and they use sense wiring to, at least, account for the wiring impedance. My experience leads me to believe that these regulators, when powering analog gain/buffer circuit will result in the best sound when no electrolytic capacitors are used between the output of the regulator and the active parts of the circuit. Typically, the best config for the reg is with a zobel on its output consisting of a 4.7uF film cap and 1R. In this configuration the regulator generally will start to oscillate if it sees large amounts of C on its output: but this can be compensated for by damping the output of the regulator further: 47 uF across the output and another 47uF across the sense wires is usually enough to make it stable even in situations where there is considerable capacitance at the load end.

This IVYIII build is an experiment, to compare with my Legato. I think the IVYIII may drive my amplifier (15K input impedance per phase) a little better with its higher current capability and lower output impedance. So I will experiment with the onboard decoupling. I find that eliminating electrolytics close to the active circuitry can result in increased transparency and more apparent "speed". I'll start by leaving the e caps off.

BTW, I tried this with a build I did for a friend with the Placid HD, and the Placid HD was oscillating with the IVYIII without the 100uF caps in place, as soon as I added them it calmed down nicely.

Thanks Russ, understood... I'll try a few things...