Originally Posted by QM
The purpose of the foundation is to hold the shape WHILE you put the block together.
I love your blocks!! I make these kind of blocks, also, but have never used a foundation. The blocks hold together just fine while waiting for the next piece. Sometimes I will trim and press the seams right away and other times I will just finger press them.
I like to make a dozen, or so, at a time. That way I can chain stitch them and not have to stop after each seam. Then I cut the individual blocks apart, press and pin the next piece on each piece. I put them in a pile and then they are ready for the next time I want to sew them.