Wow, okay, I've got a pair of 32" Osage billets that W spliced would make a 60" stave. I prefer 64"+ because I have a long draw. My plan was to extend the bow with a handle section of Cypress, and the Osage limbs V joined either side, and maybe introducing a little reflex.
I could do both!
How long would you make the V joint? If the tips were longer, you could thin outside the V joint. With say a bound joint of say 1/2" to 0 over 2", and a further 6" beyond, you would be sacrificing 2" of the "good stuff" that can no longer work, gain a little mass in the bound joint, but also gain 6" static tips that you could thin right down, dependant on type of wood (something of a contrasting colour would look nice too), that would deliver leverage and draw advantages.
I don't know about you, but I'm keen to try this myself, the next time I have access to a premium, but too short, billet or stave.
Thanks mate!