There is nothing as good as Elmer's school glue in tiny drops to keep strips in place. No pins needed, and you don't get that dreaded shifting of bottom fabric. I made 20 large (banquet size) table runners for DS and DDIL's wedding and glued each and every one of them. DDIL wanted a quilt made out of the fabric so I didn't see myself sewing them up and then frogging them all. The glue worked wonderfully well and the best part......it washed right out! I highly recommend it for strips for nine patches or sashings too. I use a little plastic bottle and a metal tip that I found at our local art store. Just be sure to rinse the tip and bottle well when you are finished for the day.
Heidi