The kit I bought last week in the UK had an amendment sheet that says (in my own words)...
If running the rear arms with a lot of toe in, or a lot of camber then reduce the number of washers in the diff from 6 to 4 to prevent the end of the dogbone contacting the diff components. Alternatively, TOP produce a 43.5mm dogbone which will solve the problem.
Would using narrower hubs, or different offset wheels achieve the same thing ?
The standard hex-hubs are 5.2mm IIRC... 4mm ones would give a net effect of reducing rear track by 2.4mm. Not sure how (if) this would be different from moving the suspension pivot points inboard though.
Daniel.