I have made 2 with metal sleeves, but the easiest one I've seen was Ryan O'Sullivan's fiberglass sleeve. Build your self bow, shape your handle but leave it a bit smaller than you want. Saw the bow in half, on a diagonal. Wax one half, screw two pieces back together. Fiberglass two pieces together! I gave up on selfbows (for awhile at least), so I haven't built one. I'd post the pix that Ryan posted, but I lost it when my old computer died in a storm. I've also swapped a hickory stave with Baker's splice cut to someone who was gonna finish the bow, but I never heard anything else from them and don't know if it was ever completed or how well it worked. There is also a build along on the Pirates of Archery site. The author cut a glass lam bow in half and rebuilt it as a TD. Good luck, and post pix.
Hugh