A composition for making a cast, thermoformable sheet or slab having a matte surface comprising a syrup comprising about 90% SSI\u2014acrylic pre-polymerized syrup at 20% solids; and about 4-10% particles of about 10-15 microns in diameter of a copolymer of methyl methacrylate and ethylene glycol dimethacrylate or such particles of barium sulfate, calcium carbonate andor silica. The center core is composed primarily of a resin and has a diameter of 3-20 mm and a specific gravity of 0. The software system provides a recommendation for an item. The resultant preview file is displayed as a print image on a display by a previewer. Generally, if the SNR of the received signal satisfies predefined criteria, the non-stationary subscriber radio unit will operate the multi-beam antenna array in an omni-directional-like manner, by equally combining the received signal from each individual narrow-beam antenna branch. The regioselectively substituted saccharide ester produced according to the method of the present invention is selected from the group consisting of oligo-saccharide ester and polysaccharide ester, having a partial average degree of substitution at the C2 position of its anhydroglucose unit of at least 90% relative to the total AS.