I used a free program called Bargello Stretcher for Windows only, not for Mac. Anyway, I played and played with it as I couldn't get my arches how I wanted them as my hands shake so my lines were shaky too. Found out if I swooped real fast on the up and down swoops I could control it better. Finally got it the way I wanted. Of course while putting it together I made some minor adjustments but otherwise I'm very happy how it came out. Don't have a photo of it yet as I haven't quilted it but will have in the next 3 months as there are 5 quilts to be quilted ahead of it. But now I'm ready to make another one as I found its not as intimidating as I assumed. Just have to jump off the ledge and try to fly with it.