I just do a basting stitch across the top. Pinning is fine. then I stitch down the sides. Pinning here is fine also. I float the top which means I don't pin the top to the bottom roller. Or roll the batting on the batting roller. It just takes practice. I am sure there is a video on utube there is a video for everything there.
http://tinlizzie18.com/archives/vari...longarm-frame/ http://www.youtube.com/watch?v=yijRqia9frw