Good quality regulator for the money. My only complaint would be what IR charges for the mounting brackets.
If yours starts to leak around the knob, simply use a 10mm Allen key to turn the plastic top cover counterclockwise 1/8 of a turn and remove. Inside there's a spring an a plunger. Remove the plunger and clean thoroughly. Also wipe down the mating surfaces inside the regulator and remove any debris (I also used a cotton swab to clean down in the hole where the plunger sits). Apply some grease to the o-rings and reinstall.