The Magician Chassis comes as a kit of parts that must be assembled. Included in the kit are detailed assembly instructions. When assembling the chassis, you need to replace the supplied battery box (four AA cells) with your six-AA-cell version (see Figure 11-3). If your battery box is the kind that holds two rows of three cells, you will find that the top plate of the Magician Chassis can hold it in place. In fact, it will be quite a tight fit and
spring out a little; therefore, you will not need to fit the middle strut.