Only really done the carpark test on one, seemed dead stiff, no rear-triangle deflection when pushing foot against side of BB.
Mud clearance is pretty good, could get fingers past a 2.4 Advantage FR (I think that's what it was).
Internal routing is the same as my Koncept, done using either a full run of outer through a tube, or with stops and a similar internal tube. Basically there's no way routing can go wrong.
140mm is what comes on them, I suspect it would go bigger.
I know of one in the Tweed valley, a phone call to I-Cycles in Inners would probably bag you a look-see. The 2010 one looks amazing (as does the ally one):
Hope that's some help.
(Disclosure – I ride for MSC)