I find this patterns very hard to follow and the reason is that the pattern is black and so is the blade. So the blade get's lost at times in the pattern and drives me crazy. On this one I tried to change some of the pattern to gray but that does not fully work since it is a picture and not a vector graphic. It is probably my biggest gripe with pattern designers.
So maybe someday I'll go down the path of designing my own portraits so I can make them the way I would find easier to cut for myself.
Thanks for looking!