Well, water ingress was definately a combination issue. The layer lines when I print at .3mm layer height are deep enough to allow water seepage, barring excessive post processing. At .2, I still get some seepage, but it turns out a softer mouthpiece (an aqualung mouthpiece off of a micron) seals nicely. I also decided the main barrel of it needed thicker walls (I may have broke one in the decision making process!). So a fresh print, and I will try vapor smoothing next... see if I can't get it to seal with the cheap, stiffer, mouthpiece I had been trying.
The saga continues......