I posted earlier re Angela Walters rulers at Creative Grids, but I ended up buying the Janome Ruler Work Kit, (with 6 rulers plus a Cross Hair Ruler), designed by Leonie West, of Westerlee Rulers. They came with instructions, a dvd and a pattern to make a holder for the rulers.
I've practiced on a 3'square quilt sandwich and have just started on my latest quilt - takes a bit of getting used to especially on the larger quilt - all the demos that I saw used a small sandwich - but I think that I'm winning