gaaa, all we are doing is guessing because we can't see much here. First in the model the edges may not match up. Second in the CR2 you should have a weld section. This section follows all of the dial listings and would be right before the texture listings. Make sure you have an entry there for this part. As long as those two pieces are correct it will not break. If bend is not on then you will just see and very bad stretch between the two groups. Exporting the mesh and welding the seams doesn't matter. If the seams match exactly and you have the weld lines in the CR2 they get welded. If the seams don't match nothing will weld them.