No one like Pockholz (Lignum Vitae), it´s hard to work with.

For instances, should the riser be made out of a single piece of wood or several glued together
For heavy Drawwights should the Riser be glued. For smaller Bows a single piece are ok.
From my internet research I see that the Lignum Vitae is waxy/ oily like Cocobola, so gluing may be a problem.
Don´t think so, but for the answer is Ulf the best man.
Some of us knows ULF personally, so we know you can trust him.
Tell him wich wood you would have found, and he will made the best combination for you.
Sorry for the worst writing, my first english since 15 years
