A method for writing data into the memory, especially a method of preventing the data from overwriting for the write operation, is disclosed. The pillow has a maximum height between the upper and lower surfaces of about 2. In one embodiment, the first channel longitudinal axis and the second channel longitudinal axis are oblique to the first side and the second side of the manifold. Specific DME geometries are provided to minimize ride disturbance and observability by radar and other sensors.