Enbedding is really more to anchor the wax to the frame. If you jostle around unembeded foundation even a bit, it becomes quite obvious that he top bar cleat is not sufficient to anchor the foundation securely in place. A bit of heat and a bump here and there and the foundation will have slid or fallen away from it original desired position. There are a number of wiring schemes besides horizontal, and I would suspect (I have never tried this) that the tangential method would do a better job of stiffining up the frame. I often observe that in well embedded foundation the queen will NOT lay on the cells that are directly over the wire.
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