Mositure meters in baler?

I just bought a new 348 with kicker do not even really have it working yet. Always had problems with making sure hay was dry enough on my ground. (My fields are so irregular shaped steep hills and surrounded by trees) I'm wanting to put a meter in to help with this.

One are these meters reliable and accurate??
Are they hard to set up and install?? Brand new baler but it's hooked to a 4020 so not like I have anything fancy there.
Is it even worth doing or are they not really that helpful?

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Mositure meters in baler?