Quote Originally Posted by Soord View Post
And the problem with this is the probe. If you put it on one rack it could skew the temps for the other. I would not do this I would put a probe on each rack, but if your heating is the same (size and type) it could be done

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So how do you think it is done with individual pieces per shelf in any rack?
I have a spare tub with a thermometer glued in it that gets rotated through my racks so I know what each shelf is doing.