A blow molded synthetic resin container having a body of generally V-shaped cross section defined by a pair of V-shaped side walls, end walls extending therebetween, and a bottom wall. In certain example embodiments, the lawn mower may be of the walk-behind type. , at least one conventional synchro-to-digital converter andor at least one conventional digital-to-synchro converter. Such common interfaces promote more efficient and effective use and management of messaging resources because they among other things eliminate the requirement to be conversant in different interfaces, rules and protocols for the different platforms on which messages may be accessed and managed. The inventions further include alternative methods of mercury removal and preparation of the polymer substrate.