A tool is provided for addressing a number of issues related to assembling software stacks including multiple uncoordinated components such as open source projects. The methods include methods of treating or preventing a disease ameliorated by modulation of premature translation termination or nonsense-mediated mRNA decay, or ameliorating one or more symptoms associated therewith. The keel rotates in the opposite direction of the wing when the wing is moved off center by wind. The base station then transmits the pre-coded pilot signals to the MS via the multiple transmit antenna elements and, in response, receives an index to a set of weightings in the codebook for use in a subsequent transmission of a data stream. The tension member may be completely removed from the implement or may remain attached and employed only when needed to maintain the wing in the raised position.