Reworking a Flight Bow

 I've got an old Hickory shoot-through flight bow with a chrysalled belly. It was a bit lethal, as I was trying to shoot it, finger loosing it, this set the arrows flexing and they tended to smash. Since then I've made a release aid, and that is probably the key to getting the shoot-through to work.
I'm going to rasp/machine off the belly (the chrysals go about 4mm deep) and add a new belly of heat treated Yew heart wood.
I'm aiming for 50# at 24" draw with a very light arrow.
Most of my stuff is on my Youtube channel now, but this post is really a log of what I'm aiming for with this bow.The bow is a Mollegabet style and I think the levers are a bit long and heavy, so they may get reduced during test/development.One dilemma is how do I terminate the new belly at each end where the thickness of the original bow increases at the grip and the levers? I'm favouring a simple butt joint, which, being in compression should hold. I'm concerned that if I try and fade it out at each end it may lift or splinter.