Someone posted in another discussion about this block that the pieces are 4-1/2 x 8-1/2, but the middle piece is a 4-3/4 square. It seems to me it shouldn't matter how long the blocks are (6-1/2 or 8-1/2), but the extra quarter inch of the middle piece makes it or breaks it.
Here's the link to that discussion. Look on page 4, post 35...
http://www.quiltingboard.com/links-r...t193902-4.html
But I haven't tried it yet, so I could be wrong. I'm going to look for the Ricky Timms tute.