It is inline before the control valve that is on the front of the smoker. When you have the smoker set to low then you can close down the ball valve I put on to restrict gas flow more to get less of flame therfore less heat and lower temps in the smoker. I can readily hold 140* to do jerky and fish so I really like it!!!!!!!!!!!Hope this helps???????
I saved your picture of the gas valve mods. I am going to try this because I wasn't to be able to smoke summer sausage and this should allow me to lower the temp to within a suitable range. Have you experienced any flame blowouts due to lowering the flame?