These guys have given good advice. I struggled with things not fitting even though i.measured the seam allowance. Finally saw the tip about measuring the block after pressing instead of the seam allowance and my units finally fit! It was a Duh moment for sure, but makes sense as your units need to fit together when it's all said and done. I like Presencia 60wt and know where to set my needle for piecing. Much happier camper now that things fit together (most of the time...)