I'd like to say thank you so much to the members who suggested spray basting quilts instead of pinning. I've just completed three 'snuggle' rugs with fleece backing using spray basting, and it's been the easiest thing I've done in a long time. So quick and no chance of any puckering. I feel like I've just discovered daylight!! I think safety pins will be taking a back seat from now on - especially on smaller projects. Thank you once again.