I used a 3 thread, but could have used a 4 thread. Set my stitch length to 4". I used a 1 right needle.
My foot pulls up at the end so I can insert my elastic tape in and under the foot. Then lower it down. When I used the smaller elastic tape, I kept it to the far right side. The roller foot pressure keeps it in place.
I did pull a bit on the elastic before it went through the foot; just a little pressure back towards me. I believe once I have my pressure set correctly, I wouldn't have to do that.
All kinds of nice uses! Not too bad from either side. Now to practice more on different types of fabrics and serger adjustments for that perfect stitch!