This is how neatly the pieces go together - I haven't done any trimming at all. I then pinned another little row on - I wasn't too sure what I was trying to line up so I just eyed up the seam lines.
Hey presto! The points matched pretty well with minimal attention on my part. Magic!
I wasn't too sure about pressing the seams. I like to press seams open where possible because I like to minimise that knobbly bit in the middle. But you can see my battle against the knobbly-bit is not entirely won.
Overall, I'm pretty pleased with how this little experiment unfolded. And doesn't my grotty ironing board provide a lovely backdrop ;-). I see a triangle quilt appearing on my 'to do' list...