I am so confused about this "scant 1/4" ". I was told to disregard this idea and just make a regular 1/4". if your seams are consistant 1/4" throughout the project then your quilt top will go together correctly and be the correct size. I am not aware that quilt pattern designers make an allowance for this scant 1/4'. I have a Brothers 1500 and use the 1/4" foot and my seams always measure 1/4". On my Singer I do not use the 1/4" foot and need to move the needle position over to get the 1/4" seam. I just made the "cosa Maya" pattern and it went together perfect and measured the correct size using my Brothers. No quilt police!!!! so just use regular 1/4" seam and go for it!.