Hi Psygorn, if you highlight naked edges (instructions here: http://moi3d.com/forum/index.php?webtag=MOI&msg=10582.13 ) this is the problem area:



Zooming in to this area:





That's a gap between edges there that is just a little bit too far apart to be joined together.

The top looks like it's ok it's the bottom where the pieces are not close enough together to be joined.

- Michael