Closed Seam "Y" as in Eastertide
I hope this helps anyone that has a problem with this type of joining. I only remove the paper in the area of the seam I am sewing. that helps with keeping the bulk down and I also press seams open when they won't cooperate.
With right sides together place pin thru point of the square to the closed "V" of the main section
align the corner points and sides to make sure they are squared and straight.. stitch from the outside edge to the end of the line do not go over it...pivot around...sew a few stitches...remove from machine.
Clip the seam at the "V" to where you ended the stitching on an angle to just inside the point leaving one or two threads... Do NOT go past it.
finger press the seam open...swing the square around so that you can align the other side for sewing...pin the points then fold the piece so it lays flat and you can see where the other seam ended.
sew from the outside edge to the ended seam then pivot around sew a few more stitches remove from machine...finger press the seam ...turn the piece over and it should be nice and flat.