I’m restoring a vintage Snap-on toll box. I’ll be using a Concours 51550 HVLP gun. The paint is Single Stage PPG Acrylic Urethane mixed at 4-1-1. The paint supplier said I should use a 1.3 mm nozzle. Would the 1.2 mm nozzle that comes with the Concours 51550 gun be acceptable or should I purchase a 1.3 nozzle?