I made a Storm at Sea quilt one year as the raffle quilt for my church's Holiday Fair. A friend offered to help by sewing one section of the quilt and I did the other. That was something I would not do again as her 1/4" was not the same as the 1/4" on my machine. I remember hearing Mary Ellen Hopkins saying that you should always make your quilt on the same sewing machine, because that gives you your PPM (personal private measurement), as machines can differ slightly. I did get the top together and a dear woman hand quilted it, but from then on I did my quilts solo, although my friend meant well and was trying to help.