A method and apparatus for underwater pelletizing and subsequent drying of crystallizing polymers to crystallize the polymer pellets without subsequent heating is shown in FIG. In one embodiment, the apparatus includes a fuel inlet and a substantially circular fuel distribution canal communicating with the fuel inlet. The mattress may also include a leg separator in a foot end portion, preferably tapered and including one or more inflatable chambers. A method for leveling tiles is also provided. A non-volatile register file configuration circuit for use with a plurality of non-volatile register files is also provided. The first and second walls have protruded ribs.