I have been holding the bones together with 5 minute epoxy and epoxy putty.
I clean up the bones, cut to fit, and do one joint at a time. I mix up a little 5 minute epoxy, and put enough to go around the outside of the base of the smaller bone, that inserts into the larger bone. This way it does not go into the opening and obstruct it. I hold in place until hardens and then do the next joint, if a three bone call. After these joints are hardened well in place and completely dry, usually the next day, I mix up some epoxy putty. It takes only a small amount to fill in the joint, and smoothed out to make a smooth transition from bone to bone. I will next wrap with nylon thread. I have been having a little difficulty with this. I have tried fly tying thread, to fine, I tried some nylon cord, to large, lumpy looking. Tomorrow I am going into town and try and find some nylon thread for wrapping fishing rods. I think that thread Will be just right. I may or may not wrap a loop for lanyard on.
After the bones are wrapped I will probably take a fine point permanent marker and put the year of bird killed, hen or gobbler and perhaps other pertinent information. I then put on a coat of Tru Oil, I have only completed 4 of these calls. I am still learning to use them, and they are not pretty, but I am learning. I have four bones from my sons last years birds and my two birds, to complete.
Last year using the wing bone call, I had three 10 inch birds at 17 yards at 6:20 am opening day, two ran off. Hunting with your own created call, adds a lot to the hunt.