Merge Non-Planar Faces

Is there some command I can use to clean up solids that end up with extra seams in them because of the way I created them? MergeCoplanarFaces works if the faces are planar, but what if they are curved, but both follow the same curve? Below is an example.

How can I remove this horizontal seam?

I can eventually remove them by re-drawing the entire thing or exploding the solid and making new extrusions to replace the old split surfaces, but it seems like there should be a way to just remove all the un-necessary splits, and I’m just not seeing what it is.

example.3dm (716.4 KB)