Hey, I've been working on doing the Expert levels. (I know I said I'd require a bit of mountaintop training with monks, but it turns out to be not as bad as I thought it would be) The way I do it, I keep some quick notes for which ways to go when it forks, but otherwise, for every "room" you enter, try to visually associate it with a set of moves to get past it, just practice it until you remember the pattern. If you run out of oxygen tanks, it will reset the level, so you can redo levels as many times as you need to get it down. You should try it too- it's not as difficult as it first seems, I promise (and I could use a little competition :-P )

Looking forward to seeing your runs. I will get back into Operation Neptune when I'm done with my with list of other projects.