Methods, apparatus and systems including a computer comprising at least one hardware processor, at least one tangible storage medium, and at least one inputoutput interface for evaluating a quality of a locate andor marking operation. A paper guide is configured between each pair of adjacent cutting blades, thus partitioning the cutting blades therebetween, and thereby allowing the cutting blades to be assembled and mounted in an interleaving fashion on the two cylindrical rotary cutters. The lift mechanism is operated by a pneumatic cylinder which is powered by an on-board compressed air tank.