The "unknown" brown wood in some of your earlier photos looks like bocote. I can't tell for sure, but it looks like it.
You need to be sure to cover the metal bolsters while sanding - You can carefully fit tape on the metal, but that will still make it hard to sand the wood to the joint area. The solution that would work is to try to get as much sanding done on the wood surface as you can before actually using the epoxy on it to glue it in place.
You need to be sure to cover the metal bolsters while sanding - You can carefully fit tape on the metal, but that will still make it hard to sand the wood to the joint area. The solution that would work is to try to get as much sanding done on the wood surface as you can before actually using the epoxy on it to glue it in place.