“In a YouTube video your are using a GRACO HVLP with a top feed gun with a plastic top feed cup I do a lot of high end work myself and have all GRACO equipment and I was wondering if I could get your gun info so I could purchase the same set up gun wise. I am a huge Festool fan and owner as well.
The Graco HLVP gun we use is called the Edge gun. In its stock configuration, it is a bottom feed cup style but is set up to allow for simple conversion to a top feed gravity style, which we prefer. Part #244136 on page 8 of this catalogue is what you are looking for, and you can probably order it through your nearest Sherwin Williams.
The attached video shows how to do the gravity conversion.