Might have been easier to just start by going in that direction... :D
Anyway, I've stopped for now, Just blew my way into (with TNT :$ ) the underground works by the teapot. Will leave it as is to let you work out where it's going from there.
Underground works? Teapot? How bored were you?
Fantastic, though. I think maybe a train track. Maybe. Or a couple more right turns.
You're the mental.I was just following instructions.
And I think Xen did a chunk last night too (he was helping me when I gave up and went to bed)
I think there's maybe a bit too much light in there for the spawner to work if/when monsters get switched back on. I'll have to revisit it if that happens.
Also, I used the underground bit near the teapot as the marker for turning right again. It meant raising the floor in one room by one block, and I need to replace a single block of earth that had a flower on it. Sorry.