[David Hodgson]

just to expand on Nassty's reply, the crown wheel can be offset within the diff housing, so too the pinion, the axle stubs will be varying lenghts depends where the carrier ends up. Most live axles do this. External IRS arms and drive shafts will be equal.

The hub alignment (toe in) is adjusted at the diff housing by shims where the lower pivot bracket is attached. I suppose Jag figure the is enough give in their trailing arm rubber bush.

My G-Force bent trailing arm has an adjustable rose joint to allow for the control arm adjustment.

Camber is adjusted again at the diff axle flanges, by shims, where the drive shaft uni bolts up.