In order for the model to balance properly, the Hitec 555 receiver, 4-cell, 270mAh receiver battery pack, Jeti Master 70-3P Opto brushless speed controller, and 10-cell CP-1300SCR flight pack had to be crammed into the area between the inlets.

To make installation and removal of the battery pack easier, the upper cross-member section of bulkhead B5 was cut out.

The aft bottom corner of flight pack battery box rests on a birch plywood "foot" (not seen) glued to the inside of the bottom fuselage sheeting. The large size of the foot helps spread the weight of the batteries out across a larger area of the fuselage.

These components were originally going to be placed in the cockpit section, but doing so would have made the model extremely nose-heavy and required a fair amount of lead in the tail area in order keep it in balance.

After initial competition flights were completed, I replaced the Kyosho AP-29L motor and AstroFlight 217D speed controller with a Hacker B40-10S motor and a Jeti Master 70-3P Opto brushless speed controller. I am still using the same 10-cell battery pack. The Hacker motor is slightly heavier than the Kyosho and the Jeti controller is heavier than the AstroFlight. The Jeti is in the same location as the AstroFlight.