Then, I soldered all the electronic parts together: the single coil pickup, two volume potentiometers, the rod piezo pickup, the three way switch, and the 1/4" jack. Luckily the circuit is pretty simple and there are many online guides out there.

I also used steel-reinforced epoxy to glue in the truss rod to the neck. The truss rod will allow for some minor adjustments to the curvature of the neck, in the case that it becomes slightly warped due to humidity or age. 

After adding the truss rod and gluing on the fretboard, I stained all the wood pieces using a mix of Dark Walnut and Ebony wood stains. I also added a glossy polyurethene coating for protection.