That's a really good idea on the screwdriver. I do feel like I am guessing on the vent sometimes. Also good to know on the top vent. With the WSM I almost never touch it (wide open) but with the WSC I notice it gets hot when I close it too much. I'll try half.
Do you do anything special...
I've had mine since it launched last April and this is my one issue. I have trouble keeping it that low. 235-ish no problem but even keeping it in the 210-220 range is tough for me. What is your vent config to keep it lower?