blender and freecad

I want to make an electric steel string carved top solid body ukulele. I can design the ukulele in freecad for the precision, and i can make the carved top in blender with the displace modifier and sculpting tools. Anyone have any idea how i can put them together? keeping in mind i will then have to cnc it and it has to keep the precision.

This might get you going in the right direction Alibre - Make a Guitar Part 1: Body |JOKO ENGINEERING| - YouTube