The "laminated wood" we use for building wood-fiberglass composite bows is purchased as strips of varying specific thicknesses from places like Bingham's, Troy Breeding, Big Jim or OMC here, and you laminate them together with epoxy glue and fiberglass strips of specific thicknesses to achieve the draw weight you are looking for.
It's not just a matter of gluing together some strips of this and that, and then carving away the composite until you get the draw weight you want. Wood-glass composite bows are normally designed and calculated to be within a few pounds of the desired draw weight before you ever mix up a batch of epoxy.
Being 'off' by .01" in the thickness of the "lam stack' -- the thickness of wood & glass sandwich -- can make a HUGE difference in draw weight. That stack thickness is normally calculated in advance, or borrowed from another builder who is using exactly the same building form and bow design.