(apologies for the double post, but people tend not to notice if I just edit mine)

WR: your map appears to be right. I've gone and made my own, and they match.

Radium: can you have a look at WR's map, and check we've not missed a turning somewhere? I *think* I've not missed any, but without compass directions it's hard to tell.

Anyway, there's one route we've not taken: going right at the very beginning. Let's give that a try.

Edit: my map (created in Excel of all things):