Ok, I really don't have the skill set you guys are talking at. The set of guns I had were all non grav feed type. This was the last one. It came with a slit nozzle and a round hole nozzle. The other two in the set had only one nozzle each. My friend just used one on the duster, but I'm not sure of the nozzle. The one I used was the primer gun and it's nozzle was a large hole that tappered out. I did see decent results with heavy metallic paint with both of the guns. So would grav guns be better for clear? And these type be better for heavies (pearl/ metallics)? Realistically I know nothing comes easy and I don't expect to have a showcar perfect job right out of the box.