Mixer vs 100% whole wheat

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This mixer just walked into my kitchen.

Does anyone have any recommendations concerning the maximum amount of time to mix 100% whole wheat without destroying the gluten?

Start with 3 minutes on speed one to mix.  Then finish with 3 1/2 minutes on speed two.  I do not know what kind of quantities you mix but I would stay well below the mixer's stated capacity for whatever dough you are using.

Jeff