@tang: The seatpost is a Thomson 410mm laback – got a good deal on wiggle, about £50.
@mr_mills: The forks are 140mm travel, 520mm atc. The headset is a Hope, zero stack upper cup with a 1.5" to 1.8" reducer lower cup. I'm running the external variant of the reducer cup to add 10mm to the stack height, preserving the geometry. The bike is set-up to crash! Those bars can spin 180 without anything hitting or tearing loose. I don't crash that often anymore, but when I do it's spectacular.
Not tried it on steep & techy yet, but on fast, twisty and jumpy it's a blast.
It couldn't really be much more different to a Bootleg if it tried…