Disappearing PinWheel

A friend recently posted a picture of a 'disappearing' block that I had not tried ... the Disappearing Hour Glass. It turns out it had been created because someone had made a mistake in putting together a Disappearing Pinwheel block .... something that I have done, but carefully took apart and returned it to a proper pinwheel instead of thinking it was a new opportunity to create a new block!
(If you want to check out a YouTube video of the process, watch the Jenny Doan quilting tutorial on-line from the Missouri Star Quilt Company.)
First .... the original:

I started with 6 inch blocks (because that is the width of my ruler) and made half-square triangles. Cuts were made 1 1/2 inches from the centre line, the length of the block. This creates a mini-pinwheel in the centre. Each of the 4 centre side pieces were flipped.

And everything was sewn back together. I trimmed the finished block to 9 inches.
I have a lot of miscellaneous white-on-white material ... any one piece is not enough for a full quilt but when mixed together, gave me enough for a queen-sized bed quilt. The greens and blue are all fat quarters .... and the bits and pieces left over from cutting them into 6 inch square became strips in the border. (the coloured strip in the border is actually a mixture of blue and green fabrics which doesn't show up so well in this picture)

Having completed this a couple years ago, it was now time to try out the 'mistake' block ... the Disappearing Hour Glass!