Apparatus includes left and right inline type cylinder heads essentially identical to one another and each having an intake side, the left and right cylinder heads being combined into a \u201cV\u201d configuration, so that the two intake sides face one another. Airborne dust reducing additives include oils, surfactants, solvents, waxes, and other petroleum derivatives. When a second passage is vacant and aligned with a selected first passage, a work bit in the first passage is urged by the shaft through the vacant second passage and through the barrel, to be set at a distal end of the barrel for use on a work object. After scoring, at least one candidate is chosen and may be used as a possible alternate query choice for a user or used to serve bidded advertisements to the user.