I used all the scraps left from piecing the blocks to begin new string blocks, as well as working on the ones that are half done. I think I have too many! A little bit more to do to make some larger blocks.
I'm is using the fabric more economically, and making piecing quicker: when I pick up a string I keep using that string by adding on more string blocks and choosing one the right size for the end so there's no waste/silly offcuts left. That's the benefit of having string blocks of different sizes on the go.
I have been looking up more blocks to make for this weekend too.
Without making the whole thing look too 'shirty' I am using up the small pieces from the charity shop shirts I bought a couple of weeks ago.