Originally Posted by peacebypiece
Count the threads that actually make the seam to hold the fabric together with a serger: 2 Count the threads that make a seam to hold the fabric together with a normal straight stitch: 2
If two pieces of thread can hold a seam together on slacks, they surely can hold it together in a quilt top.
Actually on a 5 cone serger, there are only two threads that make the chain stitch seam. The other three represent the overcasting where the fabric is cut off.