> I am trying to remain completely analog in my modular. Can anyone explain (as I am having trouble getting my head around this) are the A-149-1 and A-149-2 completely analog in their function and construction, not just signal path

If Buchla synths are your thing, it may surprise (or shock) you to learn that even the 200e isn't purely analogue (see http://www.soundonsound.com/sos/dec05/articles/buchla200e.htm#2 for details). Plus the name of the A-149-2, "digital random voltages", should be a clue. :) (Although this sounds like the electronics use of the term "digital", which translates to my software-centric mind as "boolean". I'm guessing you're not going to dismiss gate signals altogether as "too digital" )

At any rate, I wouldn't worry about it. Just get things that sound how you want them to, and don't worry about how they're achieving that effect. The listeners aren't going to care if you used a completely analogue setup. They're going to care how good the music sounds.

Be a musician, not a collector or a fetishist.

All the best,
Zoë.