I recently got my 80% arms easy jig generation three model, I milled an AR-10 80% lower and noticed something was off too much material was being removed on one side of the lowers wall. After careful inspection I realized that the top jig plate is missing a little ear that guides the router pins while milling. In the pictures below you can see the jig plate I have has no ear. And the other picture shows the little ear that the jig plate is supposed to have, I got that image from the 80% arms website. You can see a big difference in the two jig plates. Make sure that you pay attention to the top of the jig plate before you start machining anything.