In a cellulose acylate solution, cellulose acylate is dissolved in an essentially non-chlorinated solvent. Conversion of the gun from an X axis configuration to a Y axis configuration is achieved by removing the second arm segment from the first arm segment, removing the first weld arm from the body, rotating the second arm segment and the first weld arm through 90\xb0, attaching the first arm to the first arm segment, and connecting the second arm segment to the body. A most probable noise type is determined for the read channel, and a set of adaptive parameter values associated with the most probable noise type is retrieved from a memory. To release the gas, the nano-porous layer can be heated to a temperature sufficient to vaporize the adsorbate and open the nano-valves.