The other modification was mostly a convenience modification. The directions for knitting this require you to bind off and pick up stitches at every step. I chose to keep all stitches live so that I had minimal picking up, and almost no binding off. I didn't bind off any stitches until I did the outside edges. I used 4 circular needles to stitch the blocks. This allowed me to keep the stitches live and just work my way around the block. When I was finished with a block, I pulled scrap yarn through the stitches to keep them live. This make the knitting much, much easier.
I'd like to start another one, but make it using one colorway. I'm just trying to decide which colorway I like best.