I own a 473 and truly hate it. I've given it several attempts, most recently in December when I serviced it with brand-new filters for higher airflow. It just doesn't remove the solder as well as a hand-pump and I peeled 2 traces out of 6 eprom sockets that I removed. Ultimately the damage was my fault for using too much force too early, but I get better results with other tools.
I don't use hot air for this kind of stuff. Most of the time you're dealing with several pins and the board sinks away enough heat that the solder re-hardens before you can do anything. Worth a try but for this stuff direct heating with the tip of an iron is my preference.