I riveted the two halves of the aft canopy bow, including the extra flange. Van's only has one flange on the joint plate at this location. I added a second flange so that both the outside and inside flanges of the two halves of the bow are joined together.

However, when I put it back in assembly, I could see that the width had changes a bit from when it was just clecoed.

So, I did some work with the shrinker on the outside flanges of the bow and was able to correct the width of the bow so the side rails are nicely aligned again.

Here, you can see the marks from the shrinker. I'll smooth them out and prime the bow in a little while.