Abstract: a hard drive carrier is disclosed that includes a detachable tab on the top wall of the frame of the carrier. When the tab is detached a hard drive can be placed in the hard drive carrier in a forward position. When the tab is in place, the hard drive can be retained in the frame of the hard drive carrier in a rear position. The top wall of the frame and the top guide rail include a set of alignment holes to accommodate the positioning of the hard drive in a forward position or a rear position.

Abstract: A centrifugal impeller for a hand-held leaf blower-vacuum apparatus includes a central hub for mounting to the drive shaft of the leaf blower-vacuum motor and a plurality of serrated vanes for shredding drawn-in lawn debris and ejecting the shredded debris from the leaf blower-vacuum apparatus. The serrated vanes have a plurality of sharp corners on the leading edges of the vanes on which the drawn-in debris is incident. The sharp corners reduce the debris more rapidly and to a smaller size, thereby preventing the jamming of the impeller by an overload of debris.