A wall form assembly comprising a substantially rigid surface to maintain the form assembly in a predetermined orientation and at least one flexible fabric surface spaced from the rigid surface. The structures and method of the invention are useful where high strength, lightweigth materials are required, such as in aircraft and other aerospace-related applications. The male component includes a peg that can be inserted into the hole and a second magnetic structure having a second plurality of magnetic source regions having a second polarity pattern complementary to said first polarity pattern. In the remaining time, the background tuner is free to demodulate other signals to support a diversity or other function. Accordingly, one application of the composite separators is in redox flow batteries as low cost membranes. The parking ramp is so structured that it is likely to contact the outermost area of a disk, never contacting or hitting the loadingunloading area of the disk, when the disk drive receives an external shock.