I used a 3 thread overlock and a right needle. Adjusted the feed regulating knob so the upper looper extends over the beading/cording. Put the lower knife at #2. Tensions below were for soft cotton fabric:
Needle thread tension - 2.5
upper thread tension - 4
Lower thread tension - 6
Thread the cording/beading through the first slot and straight to the back slot (called tunnels). The fabric is up against the guide in the front.
I used regular serger thread, but could have used the woolly in the upper looper, and monofilament thread in the lower and needle.
I can see using this foot and adding cording or beading to the edge of a project. I am not sure about using the cover stitch and placing them away from the edge. Will have to try that next!
Another wonderful foot to add to your serger collection!