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It works just fine out of the box, but the valve action is very grindy and rough, because it's a hard steel pin rubbing against an anodized aluminum nut. I 3D printed a small ring to slide between the pin and the aluminum nut and improve the feel. Since I can't upload STLs here, go to thingiverse and find thing# 3194472.
Good quality for the shipped price. Threads are loose enough to fit a 1/2" NPT fitting if required.