Thanks! Many people have helped me over the years and I'm more than happy to return the favor to others. Bear in mind, I can't bias a transistor to save my life, but good application notes on ICs and lots of bench time have done wonders for me.
I am using two cv outs via PA4 and PA5 (the only ones identified as DACs) labeled 'Dac Out 1' and 'Dac Out 2'. Those were the easiest as I just needed to add a little DC gain to take the 0-3.3v gpio up to the 0-5v the modular typical runs on. Haven't actually tested those yet but there's little to go wrong.
And I don't know anything about this forum thingy so feel free to rename, or whatever, you think will do others the most good. I'll figure out where my 'your projects' is and post there as well.