I see the 10 minute block on this site and it's on my to-do list, at least one day. Anyway, I was looking at a local quilt shop class list and they are teaching this block but in the sample quilt they added another of the the center pieces that you wedge between the four blocks. It looks like when you make two rows of the 10 minute block, before you sew the rows together - you add in the middle piece between the two rows as if it's another block being made. I haven't tried this but it would make for a different looking layout. You can check out Calico Station in Jacksonville, FL for the picture under classes.