After the top has been tested for deflection, the location of the rosette is determined and the "micro" router jig is used to route out the channel for insertion of the rosette ring. At this point I had already pieced together the wood mosaic and cut it out.
The rosette and black fiber purfing in dry fitted to ensure fit and the channel and surrounding area is wiped with shellac. I intended to use thin Cyanoacrylate (super glue) to glue in this rosette. Shellac seals the spruce top and prevents the glue from staining the top. The rosette is placed into the channel dry and then flooded with Cyanoacrylate. Once the glue dries the black fiber purfling can be leveled with a finger plane.
Here's how it came out...