Next up the bottom:

The bottom was sanded flat and what looks like a series of boxes is actually just one large box made to look like four boxes. These were built by making strips that over lap a central box. Just foward of this is a finned part that is made up of nineteen parts, ten high fins and nine low fins:

The scan head was constructed of a dome made by Plastruct that is 2 3/4", a spacer approximately 1/2" tall by 2 3/4" , a disk of acrylic 2 3/4" x 1/8" , a telephone cord detangler and several 1/8" acrylic rod bits. The acrylic rods were cut to 1/4" and arranged in an X pattern on the surface of the dome. Lights were mounted behind these rods so that they each had a light. The telephone cord detangler is used to provide power to the lights while the dome is spinning: