I do want to share something I came up with last night that might be helpful to you applique fans out there.
I am working with what will be 14" finished blocks. I was pulling patterns from various sources...Mimi's books, Elly's books, Jane Townsend....they all have different ideas as to how far away from the edges of the blocks the designs are, so I started out measuring the designs and using the proportion wheel to increase/decrease copies of the patterns.
One important thing to keep in mind is that you want to choose designs that when enlarged/reduced, your leaves, petals, berried are approximately the same size, otherwise you're going to have some pretty strange scale issues between you blocks.
You can get your own plexi cut to spec at Home Depot. And while the red photographic tape may not be easy to come by, you can certainly find colored transparent tapes at the office supply store, or you can use a Sharpie (don't use a dry erase or those pens they use to write on overhead projector slides or you'll have ink all over your hands and fabric).
Hope these were useful tips. I've got to run and toss everything into my tote bag for class. I'll just have to pick my pattern once I get there. (Nothing like a little pressure to get the adrenaline going on a lazy Sunday.) Enjoy your own lazy Sunday afternoon!