I use a double action Paasche VL (it's not gravity fee) and it does a good job,
but a pain to clean. One advantage to it over the Badger is all metal parts.
You don't have to worry about thinner damaging it. Over the weekend I had a
helluva time getting it to stop spitting after I cleaned it. I ended up having
to dump the whole thing in a ultrasonic cleaner. fun!
Jim W.