I'm using a 1.3 or 1.2 tip on my guns. most guys use a 1.4. Mine lays the paint out like glass. I got 4 guns.three are from TSC=tough s**t charlie.=tractor sale company. We call that place that name. But got the guns for 75.00 there close to christmass time.Its was a three pack,one small touch up gun and two full size guns,one has a 1.7 tip the other has a 1.4 tip.All three of them are gravity feed guns. My favert gun in my is my Accuspray Isaac Newton gravity feed HVLP gun. Payed 325 in 2000. Never has a proublem with it,the best spray gun that I'd ever used. Use devilbiss,Sharpe, Binks,SATA Jet.It beats them all in my book.Had an old boss who'd had a SATA JET.used my gun and he loved it.Likes how it lays the paint like glass. I havent rebuilt it yet. But will this year some time.HVLP Gravity feed guns are easy to take apart and clean.They use low presure=less paint over spray in the air=more paint spray on your car ,truck and so on.They use less paint to spray=saving you money!!! I will never ever use a pot feed gun ever again!!!![:'(] Been using gravity feed gun since 91 and never looked back. Here the pic of that gun,but mine is black.