A few days ago someone posted that they had sewn in a class, I can not remember all of the details, the instructor said not to iron, so, I thought to myself, this deserves a chance. I was making quarter triangle squares (think that is what you call them) when I joined pieces I finger pressed and it was not until I finished sewing entire block, did I press. I was amazed, all of the blocks met in the middle exactly as they should, maybe there is something to it, does it get distorted after pressing? I am going to try this again, hope it matches when I do. Thanks to the poster who shared this, too soon to say it works, but it works as well or better then my pressing after each seam.