lately I've been using the wall to sandwich my quilts. I pin the backing to the wall, spray the 505, stick the batting, spray the batting and stick the top. If when attaching the batting and top I feel any wrinkles, I remove and try again. The 505 allows you to re-position the fabric. I found this method great because I don't have to do it on the floor anymore.
I tried also on a table doing by sections and that is fine when the quilt is not too big but my preferred method is the wall. I found it on a u-tube.
here is the link:
http://www.youtube.com/watch?v=nwV8tUkhxUM
andrea