Originally Posted by
PaperPrincess
Next, when you make your HST for the pinwheels, make sure that when you trim them down/ square them up, the diagonal seam goes exactly through the corner. All your HSTs should be pressed the same way, for instance toward the print. When you place the 2 HSTs together, the seams should nestle together.
Here's a you tube video on one suggested method
http://www.youtube.com/watch?v=O18wxk9BZk4
That's what I was thinking ... the HST's were off before you even sewed them together. If you make your HST's larger then trim them down ... make sure that the diagonal line on your ruler is over the diagonal line of the HST. If you put the diagonal on the opposite corners you get wonky HST's and lose your points.