[David Hodgson]

Steve,

As Les says, if the pinion is offset lateraly it does not matter, it will most likely be offset verticaly as well. The alignment does not need to be in the "same axis", but the two axis should be in the "same plane" to look after the uni's and vibration.

I have another jag diff at home, I'll measure if the pinion is in the centre. My guess is not.