This is the attachment of my fourth sling to the machine. This is the sling I use for classes, and I never know if I'll be teaching on a 6', 10', 12', or 14' table. When I made this sling, I considered using a pretty fabric instead of using the muslin. One of the purposes of this is to also find errant threads on the batting, and pretty fabric would necessitate a longer inspection of the sling for threads before loading with the batting. Time is money - I went with muslin.