Does FX Impact regulator location make a difference.

Right now .30 exacts 50.15 gr 25 yds 5 shot ragged hole at 835 to 840 fps. But I have it set at 150 bar and maxed on settings. Hoping to get it.a little more efficient on air and.possibly pish the pellet a little faster. Can I get any better tuning adding the reg? 
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