AP regulator is not the best in the business by a long shot. they are good dependable regulators, sure. but search that thread on this site to DIY on a regulator and those dual stage units will blow the AP out of the water no doubt.
reactor wise, i am partial to the GEO as that is what i run and have only ran. it has been very stable for me and is top notch in build quality.
corey
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