a device for independently tensioning lines includes : a housing ; a control handle extending from the housing and configured for manual rotation by a hand of a person ; a first line extending from the housing ; and a second line extending from the housing . the control handle is manually rotatable by hand about an axis in a first rotational direction , whereby at least a portion of the first line is drawn into the housing when the control handle is rotated in the first rotational direction . the handle also is manually rotatable by hand about the axis in a second rotational direction , whereby at least a portion of the second line is drawn into the housing when the control handle is rotated in the second rotational direction . the rotational direction is opposite the first rotational direction .