I did some testing last weekend and found that moving this thing from left to right has more effect on higher temperatures.
It had very little effect at low temps. It seems that by just being in there it does the job, but as I went up in temperature, there was way more control of either side.
I admit when the temperatures were at the greatest difference I opened the lid to let it cool a little to help compensate for the high temperature differential but moving the slide adjuster evened it out.
It works as designed and now I have control of it.
What if you wanted to cook at different temperatures left and right? I guess you can, or you can make it even throughout.
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