Keyboard keys are outfitted with alignment features whose configuration, placement and geometry on a key serve to allow the key to automatically self-locate when the key returns from a pressed down, accessed, position, to its home, resting, position. Selection of a compression rate can be based upon the image source and the image characterization. The rail assembly comprises an optics mount, a pivot mount, an inline mechanism mount. A plurality of memory cells are disposed on the main surface above the well region.