On the vents the way I remember to let myself know if they are open or closed is if your right in front of it closed is always counter clockwise vice versa for open. I also have a long sturdy pigtail type flipper I use to stoke fire and its great to also use to turn vents AND if your good enough you can use the pointy pigtail to kinda poke the vent hole to see if its open or closed or what. Thats my big complaint about the weber 22.5 is to adjust the vents you need to be nose to nose on them to adjust them. PAIN IN the ARSE. But that pigtail makes for a nice arm/finger extension.
Rubbed for Your Pleasure bbq team captain
2 New Braunfels Barrel Smokers - love em
Chargrill gasser/smoker w/sfb
et-73 and ET-732 Maverick dual probe