A random access pointcast video delivery system provides the means for a viewer to select a video advertisement. After filling with water a tablet containing a carbon dioxide gas generating substance is added to the water and the gas pressure is used to deliver liquid from the container to the underside of the razor blade unit. In its method aspects, the present invention comprises the addition of the wash solution to the sequencing reaction product prior to filtration, followed by filtration to reduce or eliminate unincorporated dye terminators. Additionally, a collagen product may be injected within the lens capsule to improve lens cell proliferation and differentiation, and to improve the configuration, shape and structure of regenerated lenses. In one preferred embodiment, additional smaller spikes extend adjacent to and spaced from the knife, which further facilitate cutting roots and toppling a tree in a single movement.