Rib on edge ?

Hello guys, I have a little problem with model and this problem is last part of it. I will attach the picture of it and the part file too. I don´t know how to make that "rib". Can u give me some advice ? I tried rib feature and the boss extrude too, but that was always a problem to make it... When i made the rib below the edge of cylinder its seem to be OK, but i need it to end on the edge according to picture. Thank you

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