right,,, like they said an inch or two above center, ( isn't there another topic on this same question right now or is that paleo planet???)
but anyway
have you considered a glued on arrow pass. if you read up on this topic you will see many people have bows break or check (split) at a cut in arrow pass. this happens for one of two reasons, i think.
1. the bow bends slightly in the handle leading to a break at the weak spot.
2. the exposed end grain of the shelf leads to a check ( a crack going lengthwise, like when you split kindling). the check spreads to a bending portion of the limb and the bow comes apart.
because the handle wrap covers the area of the bow under the shelf, you might as well glue on a piece of leather for your shelf. that way your handle is stronger . this has the added benefit of being adjustable if you don't get it right the first time.