Air Hose for spray gun

This forum is tops for anything painting that's for sure. I'm grateful you guys read and answer my stupid questions. Like the next one. I'm not ashamed to ask because another novice is wondering the same thing.

I have a diaphragm regulator. I have upgraded my system to the high flow. You can see the sizes of the orifices in the pics. It's being choked down at the regulator whereas before it was being choked by the air hose fitting. I was planning on painting my hood for the last time tonight or tomorrow. Would I be better served waiting and using the Motor Guard RG4049 or the like to increase my chances for success? Thanks

Edit: Looked at a few 3/8" air hoses and measured the ones I have and the largest orifice in the crimped on fitting is 1/4", so I guess it's inconsequential CFM-wise.
 

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