best of luck with the tour,i have just bought thorn sherpa frameset ,
i hope to build it up over the next couple months,im thinking useing xt shimano
no idea about rest of build,, sure your in the same boat.
so about the frame, its fantastic ,,,everything a tourer needs .
comes with bottom bracket, (square taper) fsa headset ,and thorn own seatpost,.
the service is second to none from thorn, hope this helps