I sprayed some epoxy primer last night with a new Performance tool HVLP Gravity feed gun from Orielys. It was only $100 so figured it would be fine for primers.Came with a 1.5 tip. Paint called out for 45 pounds to the gun and 7-10 at the tip. When I would get 45 pounds to the gun and then adjust regulator with trigger squeezed to 10 pounds when I let off the trigger it would only show about 25 pounds? Is my regulator bad? there was no way with regulator set to 10 pounds that I could get it to show 45 pounds when letting off the trigger.I even turned regulator up to 120 at compressor and still wouldnt work.Whats the problem and what should I do?