The Suits of Ringmail say, "..can be used in armor with a plate or chain appearance" -- which, of course, is not the case. UPDATE: The same is true for Cloth and Leather Suits.
You will need to be more specific. I looked at the Marnek's Mankind Ringmail, all 7 pieces, and all said leather and cloth. I looked at the Winstalker's Mankind Ringmail, all 7 pieces, and all said leather and cloth.
So, what happens to us that opened the kit knowing it will work for plate and chain, but ended up with ornaments that only work for cloth? ...although, tradable ornament pieces, it was once a kit. Can we get our DB coin back? Just revers the transaction. Are we stuck with pieces? Can we get a free item that allows us to 'kit' it again?