I tried the race the first time I used the technique. Subsequently, I get up after each row of sewing and iron the seam and then, at the end, the whole thing is done. It takes longer but I find the prospect of ironing all the seams in one go daunting and it feels like ironing laundry and not a quilt top. It remains a wonderfully interesting and fast way to prepare a top in a short time. I now cut a strip off each new fabric, cut it in half and save them for the next non-race jelly roll quilt. It is also a nice way of getting something done when inspiration runs low.