Ron,
I use a Graco 4900 HVLP w/pressure pot for rails and spindles on almost every deck. The overspray is minimal. The pressure pot, I only use if I am painting the exterior of a house or large areas; well hell, you can paint a car with an HVLP!!!!I use my 190es to do the flat work with a 3 foot extention.
If your budget allows for it, I would buy it. I do an awful lot of painting, so I could justify the $1500 purchase.
Jon,
The pressure pot stays on the ground. An air hose and a paint line zip-tied together is what goes up the ladder with you. On railings, I just use the 2 quart cup gun and refill as needed. There are fluid, air, and pattern adjustments right by my thumb when I am spraying. It is like anything else, I got use to doing it, now I fly through railings without the drips of stain on the deck surface.
An HVLP uses less product compared to an airless, because there is less overspray. You definitley have to practice with it first. The viscosity of the product is the most important while choosing the fluid tip is as equally important.
For me, it has saved me money and opened up different types of work for my painting side of the business. Hope this helps you make a decision. Good Luck!!
Jordan[sb]