The mistake in the above 4 finished blocks is in the first one. The lower left blended 9-patch is turned the wrong way. The navy diagonal is not doing its job of keeping the larger navy diagonal going through the block.
It has happened 3 times and let me tell you, they are not fun to fix! I have laid the blocks out with everything going the right direction, but somehow I get this block turned without even realizing it until it is all sewn in.
Other that that, these blocks have been a lot of fun to make. I have 13 blocks completed, and have just 7 more to make. I try to get a good bunch of sub-units made ahead, and that makes finishing blocks a lot faster. Fun, too. *grin* I am getting close enough to 20 blocks to begin thinking ahead to the sashing and cornerstone blocks that I will need to make.
So back to the sewing machine for me!
Happy Quilting, Friends!