Glad to hear everything is starting to work as it should.
When I enlarge your photos, it appears the center rib is wider than the outside ones. Is that the case? When I look at the photo I took of my new Delphi sensor it appears all the ribs are the same width. I can definitely see a curve in the ribs but I can't tell if they tilt or not in my photo.
I just held my old sensor in my hand and the ribs appear to tilt on it so I guess they all do.