I have done the same sort of pattern on a customer's quilt (on my longarm, but you can do the same thing on DSM), and rather than tying off for every square (for me, triangle for you) I just did a straight line over to where I wanted to go. You can see it in the third picture of my blog, here:
http://farmquilter.blogspot.com/2014...mer-quilt.html Works really well.