Recently finished the Aragon Bag, can't wait to start the Aeroplane!! What a time saver to get all the. Interfacing one-stop, because of course, one shop doesnt carry all these items. If you feel like making 3trips to JoAnns with a coupon, you can save a bit off the usual $5.95/ yard for ShapeFlex or $6./yd for Peltex...if they have both in stock at the same time. Soft &Stable isn't carried by many quilt shops, nor are the assortment of zippers needed.