A plastic case was repurposed from an old utility tool for this project. However, any oblong plastic shell (about 7 inches in length, 1 inch in width, and 1½ inches in height should suffice). It should be similar in shape to a flashlight handle. The case utilized in the project opened in half, revealing two halves of the long sides.
The nozzle was hot glued onto one of the sides, on the top lip of the half-shell. This way, one half of the nozzle was unsupported. When the two halves were shut, the nozzle rested flush with the top lip of the second half of the handle. Two holes were tapped into the bottom left, and right corners of the case. The switches were threaded through the holes, so the switch handles were protruding. The two individual circuits (vibration and LED), were placed in the shells, and secured with hot glue once a position was found where the different components (battery holders, wires, motor) could fit together snugly when the shell was closed. The shell was closed, and sanded lightly. Optional steps including installing rubber grips on the handles for ergonomic support (the repurposed shell had grips already attached).