i'm in the middle of safety pin basting a quilt sandwich and i thought some of you might not know about this tip.
once you tape down the quilt back and have the batting and top in place - slide a marble under the quilt back to ride along the table or whatever surface you baste on.
the marble makes it easy to pin thru all three layers with ease.
you just insert the curved pin into the sandwich right next to the marble and close the pin.
then slide the marble to the next area you wish to pin and keep repeating until the entire sandwich is done.