I absolutely love all the blocks I see here. What a talented bunch.
Fussy Cutting and Paper Piecing.... the low tech method.
For those triangles in Broken Heart, I made a template out of paper. I made it the size of the finished triangle with a 1/4" seam allowance. Then I cut it out on the seam line to create a window. I put the window template on the fabric till I found what I wanted in the triangle. I taped it down and rotary cut it to the exact size that I would need for sewing so there was no room for error. I do the same thing for the centre squares.
Sorry if this doesn't make sense, I am just done with a migraine.