Thanks for the help folks. Yes, I think there is some polyester in there. All of my blocks are 12x12 when finished. I'm thinking if I add a fusible backing to problem materials only (still in their blocks) and then re-measure and cut if needed, it could work. What do you think?
Sashings are done to the right of blocks right now. I have no shame and will pick them off if needed.
Thimblebug6000 what is a cornerstone?
Ayla