I have a gallon jug of Elmer's Washable School Glue by my pressing table along with several small bottles to fill and go. I gave up pinning when I discovered the glue on a You-tube video by Sharon Shamber on how she uses it. It's the best tool in my studio. I use it for every seam I think will be a problem, holding bias edges in place, tricky intersections, long seams and binding. Love, love, love it.
peace