A force-adjustable hand-held coffeeespresso tamping device is used to uniformly pack grounds and replicate espresso quantity and quality from one cup to the next. The light units communicate wirelessly with a remote master control unit operable from the cockpit using a low power spread spectrum signal centered on a single frequency to avoid interference with onboard aircraft control and communication systems. Using estimates prepared based on such an impairment compensation sequence, individual phase intervals may be grouped according to similarity of apparent aggregate effect of the impairments thereon without identification of individual impairments active in the particular phases. The holes are confined to an area of the shaft body that is substantially three-fourths of the circumference of the sidewall. In this manner, multiple rolls of material can be continuously unwound without substantial downtime.