I do minki backs all the time. I even do minki on the front and back. I have no problems. As was suggested, load the minki with the selvage on the leader cloth. Be careful not to stretch the fabric side to side with the clamps. They should be tight but not stretched. Batting is up to you. I usually put a batt in them, warm and natural or 80/20, but you can do it without too. Good luck, don't be afraid of it. Minki shows the quilting beautifully.