The 3 piece method is what I've used for yrs now. Sew a 1 to 1 1/2" band across the top edge (like a narrow skirt waistband)..and I pin all around with large safety pins. The 2 inch or the ones made for pinning quilt layers together. Works beautifully--my 'band' lies on top of the box springs--the mattress sits on top of the pins--never had any probs at all with changing sheets! Easy to remove & launder!