Embodiments of the present invention provide for embedded change logging for data synchronization. The elongated base member has holes formed therein along at least a portion of the base member. The key and keyway are provided at a location positioned between 45\xb0 and 270\xb0 in a clockwise direction around the circumference of the planet shaft, with 0\xb0 being defined as a point at the planet shaft circumference corresponding with the largest distance from the centre of the bogie plate seen from the rotor side onwards. The transmitter may send a poll anytime regardless of the HARQ processes if the most up-to-date polling is determined to be not as important. Moreover, test sequences may be dynamically determined for the dice of a set of dice being tested in parallel, such as in response to feedback provided by sensors monitoring the dice, to address various side effects. For a compressed image in the internal memory, a reservation for editing a picked-up image corresponding to the compressed image and recorded in the unmounted removable external memory can be made.