Sadly, I've reached the edge of my current capabilities and have made no progress. Here's hoping that
post #2 comes to fruition.
In the meantime, I'm using a variety of tools, Ambisonic Toolkit, the AmbiX stuff, Wigware, and BlueRipple for TOA mixing. I also have the BlueRipple Harpex upsampler which is nice for my tetramic recordings.