Max, nice paint work to date, lookin' good. Among my other AB's I also use the 200G, fantastic little work horse I think. I've experienced the paint buildup and spatter you described, here's what works for me to combat it.
I keep a supply of Q-tips handy and some lacquer thinner in a squeeze bottle. A couple of drops of thinner on the Q-tip and inserting it into the AB tip area, then a twirl around the needle and nozzle, will instantly remove the dried paint on the front bits of the AB. That takes care of the front of the AB.
Then I run the pressure up to about 25psi and spray out a short blast, to help purge any build up in back of the nozzle. I use very small paint loads in the AB cup, that way when I quickly run out I spray some lacquer thinner through it, then it's cleaned out well for another round of painting.
It doesn't take much time, well worth it in order to avoid the spattering you describe. Hope it helps. Thanks for all of the posts and photos.
Patrick