Gun makes all the difference with HVLP. Graco and Titan HVLP guns feel like cheap knockoff after thought products. If your doing large sets of doors you would feed it with a pressure pot maybe a 2 gallon pot.Yeah those RAC X tips are pretty sweet. I actually switched to Tritech on the advice of some folks on here and I think they're even a bit better than the Graco, seem to maintain a better fan pattern without tails.
As to the AAA that's good to know, maybe I should save my money and not buy one. I know repaint Florida on here uses the AAA with breakthrough and seems to get great results, so I figured maybe it was easier to lay down a smooth pattern without putting as much on there, similar to an HVLP.
Which brings me to why not HVLP? I was loaned a nice capspray 115 from a friend, and spent a couple afternoons trying to dial it in with a few different waterborne finishes. I got some good results, but I seemed to have more problems than success. I even ordered a #4 and #5 needle set, thinned down 10-20%, etc and was still having problems. Whether it was the machine clogging, or getting dry spray. Then there is holding the cup gun full of paint, and the fact that it does go a bit slower than an airless, especially when you're doing 40 or 50 doors. Long story short after 15 years with an airless and knowing I could get pretty good results with the experience i have on that machine, I decided to not go for the HVLP. Although I will say when it was dialed in it did lay down a beautiful finish!