I agree, the stab stitch method is about the only thing that works over those bulky seams. It is one reason that I mostly press my seams open. My personal opinion...unless you are entering this quilt in a show, don't fret about how the back looks overly much. By the time it's washed, no one is going to see/notice those oddball stitches on the back. Obviously we all strive for perfection in our stitching/quilting but I just can't make myself quite that crazy. This is supposed to be fun!