Paper-piecing... Keeping edges of block on grain.
I am pretty experienced in paper piecing, had done Judy Niemeyer patterns and also PP many blocks of my Dear quilt.
One thing I have never been able to achieve is making sure that when piecing triangles whose outer edges are the outer edge of the block, to be on grain. I generally cut fabric in squares, retangles or strips based on the size of the piece I need and trim off when trimming up the block at the end. But when the fabric is folded back after it's sewn to the previous piece, the edge does not lie on grain... Does anyone have any suggestions for making the edges on grain.
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