I am a seamstress and instructor and always tell my students not to do this. I will never, ever clip a seam to reduce bulk. I do not like this technique and wish all quilters would stop worrying about this tiny bit of bulk. Press the seams as best as you can open or to one side. It will get hidden in the batting of the quilt and absolutely does not matter. The clipping ruins the seams and over time these broken seams will come apart. If I sound firm it is because I want all of your gorgeous quilts that you have put so much effort into have the longest quilt life possible
