I have two UFO's pulled out to work on. boy on the one I so did not have an accurate 1/4 seam its just a bit bigger and the blocks are 6.1/4 not 6 1/2. Of course I figured that out after I cut the blocks to go between so need to trim those down now. I am so used to using my new foot that these old blocks stumped me a bit. Awh well the things we do when we were learning.