Originally Posted by Kassaundra

Well I made my first boom 21 block today. It is an extra for H4B. When I saw your sea turtle fabric I decided you needed one of this block, I made it a couple of booms back for an ocean quilt.

The technique has thick seams but as long as you aren't hand quilting shouldn't be a big problem.

Here it is before the "magic" of the folding edges.
[ATTACH=CONFIG]595828[/ATTACH]

and here it is after the edges are folded and stitched.
[ATTACH=CONFIG]595829[/ATTACH]