Handle Design Help

[Crick3t]

Hello!

I'm preparing my equipment for my first laminated bow.  It's going to be Bamboo-Backed Ipe.  I absolutely love set-back handles, mostly akin to typical handles found on Horsebows.

This picture is not to scale, nor are the curves all 100% accurate (so bear with, please) but do you have any suggestions for ways to make this design work?  Note: The drawing is intended to be an unstrung finished blank.

 

In the picture, there is a black line separating a chunk of Ipe that forms the riser from the Ipe limb core that runs out to the tips, which goes all the way along the back of the handle.  Should I run the Ipe from tip to tip, including across the entire back of the riser, or should I have two separate pieces fade in at the top and bottom of the riser?  Which would be more structurally sound and/or generate better performance?  I'm leaning towards the one piece so there are less seams, but I'm worried that not separating them might cause unwanted stress and cause my laminations to come apart.

[Sam Harper]

If your handle is stiff, it shouldn't matter whether there are seams or not since the wood there won't be under any tension.  It's going to be hard to make the ipe bend around your handle, though, unless you grind it pretty thin, which will make it difficult for you to tiller later on.

[Crick3t]

So would it be easier to just back the Ipe and add the handle onto that, instead of trying to sandwich the riser between limb backing and core?