I was having problems regulating the heat on my Masterbuilt 30" Vertical Propane Smoker. After researching possible solutions for the problem, I decided a needle valve would definitely help. I looked at possible mods and settled on getting the Bayou Classic 0-30 Adjustable Regulator, M5HPR-30. This is a high pressure regulator and my smoker utilizes low pressure, but this is what was advertised on the Bayou Classic webpage: Instead of trying to buy all the parts separately, I bought the whole kit at a great price on Amazon. The installation process was very easy to do. I laid the smoker on the side and unscrewed the hose. I then attached the hose from the new regulator. Do not overtighten this connection!!! Attach the regulator unit to the propane bottle and check for leaks. You can pour soapy water on the connection and check for bubbles. Straighten up the smoker and you are ready to go! I smoked ribs to try it out and it worked like a charm. I did all adjustments at the regulator, leaving my knob on the smoker on high. I was able to make small adjustments that held well. A couple of hints: Turn the gas on and off at the propane bottle first. Prior to starting make sure the door to the smoker is open. Turn the adjustment knob on the smoker to high (some start it on as lower setting, i.e. your preference). Slowly turn the valve on the regulator open until you can just hear the hissing of gas. Then light the smoker. I put a mark on the regulator control knob approximately where the temperature held at 225.