John, You might look back through some of the previous posts on using junipers. Different bowyers have different opinions. I routinely use the staves "as is" and leave the sapwood alone. That makes for some bows that are nearly all sapwood, but I haven't noted any problems with performance. Others have suggested they get better performance by removing all, or at least most of the sapwood. To complicate matters, many staves have an ill-defined, or even wandering divide between sap and heart woods. As crookedarrow and Keenan noted a short/wide limbed bow with sinew on the back is an excellent design for juniper and then you can pretty much do whatever you want. Ron