Here is a sketch of one of the 3 Ethiopian militia figures armed with swords and spears.

The figures are coming along nicely.  There are three basic poses and each has an arm with a sword and one with a spear.  Although designed with a specific figure in mind, the arms are almost completely mix-and-match.  (A couple of the more active arm poses don't look good on the standing figure.)  So with 3 figures  x 6 arms = 18 possibilities; I'd say you have about 15-16 possible variants.  In a pack of around 18-20 almost each figure could be unique.  And that's accomplished with all the heads facing forward!

The Ethiopians and their arms remind me a lot of the old Ral Partha Pathans except that the shields are cast on the Ethiopians.  The arms fit snugly in the shoulder sockets so once glued on with a good epoxy they are unlikely to come loose.  The best part: the cloak hides the seams so you don't even see the join.