I ordered one of the Samtec MEC1-120-02-S-D-A expansion connectors for expansion via P1, but the part number is incorrect. That part has 7 and 24 positions per row, it should have 5 and 15 to match the actual hardware. I can't find a matching Samtec part!!!
Sorry, I just noticed the other thread on this matter. I can't delete this post!
Leon