I have tried different weapons with the armour and it seems that the sheathing point is dependant on the armour (in this case Daedric) rather than the weapon so I'm not sure if its a case of altering properties or the mesh itself.
Any help at all would be appreciated.

(I know very little about modding but am willing to give this a try provided I can alter it with current tools and not have to wait for CK)