I've been listening to Argent's Nexus every Friday since April, and I started playing along to "A Man for All Reasons" when I listened to it to-day. I figured out most of the bass part just by doing that, and, after an-other three or four listens, I had the whole thing.
I do make some mistakes (because some parts are a bit difficult to play - jumping between the lowest and highest strings, for example) and I'm pretty sure I have some of the rhythms wrong, but I just learned it to-day.