I am of the camp that has hard time making HSTs with bias outside edges. I have done the biased version stiff as a board but really hate having to work with them. When I see a pattern with the bias outside edges, I either use the "magic 8" (I think Eleanor Burns showed that technique many years ago "cause I have used it for a very long time) -- Kitsie has the techniques that work in her diagrams.
There is also a technique that allows you to make a lot at once (similar to Thangles but without the paper). I don't have the printed directions, but plot it on paper before I do it on cloth.