Sinking Feeling Rout

For a long time I've thought that Sinking Feeling could be routed, seeing as you have to destroy most of Lash's units anyways to win. However, the difficulty in destroying ALL units (as opposed to leaving a few alive) is that the north island, where Lash makes her air units, is out of reach for rockets and missiles. Recently however I've found that on NC, it's not only possible to rout Lash (including the battleships), but you can also get the lab map AND finish with a 300 point S-rank!

Part 1: http://www.youtube.com/watch?v=DNNCOIzB2Fg
Part 2: http://www.youtube.com/watch?v=O8lJzU7ljs8

Note that HC is also possible to rout, but it's far more difficult and I can't find a way to do it fast enough for the 300. The main problems lie in the fact that Lash has 2 extra subs to destroy and her rockets hinder your progress greatly. Anybody care to give it a try? I can provide the SAV file if needed.