Step 1: Gathering All Parts That You Gonna Need
List of things:
The case with keyboard
I get mine you a local supermarket
Soldering machine(30w or higher)
Old USB cable
Glue (don't use hot glue, wood glue it's perfect to this work)
Step 2: Cutting the Old One the Right Way.
Tip: cut the with line only and you will be fine.
Step 3: Soldering Stage
Tip: usually in the vcc, data+, data- and ground are identified on the keyboard controller,
Step 4: Now You Gonna Need to Work on the Wood Case
Step 5: It's Time to Take Some Measures, Cuts and Glowing
After drawing, it's cutting time and sand the pieces of wood to get the "high-end" look.
At the time to glow everything, place the keyboard in the wood to see if everything is like it should be, and then first glue one of the sides, then put the keyboard on it again and glue the other side, just remember to don't glue the keyboard but before gluing cut the hole for the controller, if you did everything correctly, you can glue the top and bottom frame wood.
Step 6: The Grand Finale
After the sand and the varnish work just connect everything and check if is everything working the way it should.
If wen you press a button and the keyboard notes two letters you may have to re-weld the wires, in that case good work.