This disclosure enables high-productivity controlled fabrication of uniform porous semiconductor layers. The cable tray support assembly includes a plurality of support pedestals and a platform section. An elongated pocket portion extends from, and is in communication with, the second compartment. Portions of the expanded stent project outwardly into engagement with the vessel wall to more securely attach the stent. In addition, each instrument tray has displaceable locking device, with which an instrument tray can be detachably fixed to an instrument tray lying immediately below. Each of the second components produces a second score based on a combination of the first type-score and a measure of degree that the preliminary type matches the question LAT.