[color=#373E4D][font=helvetica, arial, sans-serif][size=3]Hi, thanks for asking. 1 - Yes, the construction is fully hollow With just a bridge block 2-The Pickup is the EMG-40DC Bass Guitar Dual Coil Pickup Placed employs parallel coils (ceramic loaded) to produce a deep low end while Maintaining clarity. 3- The bass has no piezo installed. It has made the hole in the saddle channel to facilitate future installation. 4-Here attached a photo of the headstock shown in detail; in the body it is not visible in the photos. Feel free to contact me if You have any questions.[/size][/font][/color]