Hi yophie, so another problem area is a slight lack of symmetry between these 2 "lobes" making up a section like this:



In order for those edges to match up with each other when they are circular arrayed there should be a tight amount of symmetry in those pieces, it seems that they are slightly different in shape in your original file.

I deleted one of them, then mirrored it to make sure it was symmetrical, then after that I did an array circular and got a better matching base piece which is attached here.

- Michael