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We have them in our 7120. They work fine. I'm still not sure if they reduce whitecaps or not because the last couple of seasons wheat has threshed so easily that I cannot get a good comparison. This year could be different.

My biggest problem with the sunnybrook concaves is that they are very heavy. Each half-width concave weighs as much as one whole hard thresh concave, and they are tricky to install too since each half can only hang on one bottom pin instead of both. They recommend you bolt the halves together when they are installed, which we do as well.
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