Too bad there's no way to predict which coffee filter will fail because you could not use those and keep them to stabilize scrap blocks. I've never done it but have ready plenty from people who have. My coffee machine uses the same filters but mine seem to stay together.
I really like your rag quilt. I've never done one using blocks like that. Always flannel top and bottom. They are not a quick project with all that snipping.
Hooray to you for marching. Don't put your sign on a stick. If I lived in the states, I'd be out there, too.