Spray gun system with resilient flow control valve

A modified needle assembly comprising:

• a first shaft section having a first end, wherein the first end is configured to be oriented toward a nozzle sealing surface of a spray gun system;
• a second shaft section having a second end opposite the first end, wherein the second shaft section is configured to sealingly engage in a non-wettable needle chamber of the spray gun system;
• wherein the second end is configured to operably engage with components of the spray gun system and the first end is not configured to contact the nozzle sealing surface to form a needle-nozzle seal;
• and
• wherein the modified needle assembly has a needle length dimension that is less than a length dimension of a needle passageway of the spray gun system.