Thanks for the info Andrew, did think i was goin ga ga, as a T2 owner this function is not on my vehicle, but makes interesting reading. incidentally have you ever de-activated the ARB? If so was there a noticeable difference in the ride.
I haven't yet tried it on-road - but practically that may not be possible anyway as the arb is reconnected at any speed above 12mph. Off-tarmac there is no noticable difference in the ride. I simply take it on trust that demounting the arb will increase wheel articulation, but I haven't yet tested that. I do, though, tend have it disconnected it when greenlaning - or at least on anything that looks remotely like an axle twister, so yes, I do use it.
Whilst I have a 3 ton Sealey trolley jack, I'm not sure that the lift is high enough to get a rear wheel off the ground by jacking under a chassis rail - so I might not easily be able to measure the difference in articulation. When the weather improves, I'll try it.
Cheers
Andrew