In the absence of duplex nails, what can I use to make target points for cane/bamboo arrows - I have straightened the shafts and filled in the open ends with 1.5 inch dowels cut off flush with the end of the shafts? I have bone, antler and water buffalo horn but I am not a fan of metalworking, although I'm OK with gluing in nails/screws/nuts and bolts.