Word of Warning Rear Toe in

[snapper]

Do you mean that you cut off the mounting bracket, packed and rewelded?
The Lightning rod boys used to pack out the hub carrier with a washer or 2 to get the wheels square.

[Ashtonr]

Yes cut off the mounting braket and packed out 2 mm. I also notice that there is a fair amount of movement on the actual carrier bushes so after this excercise I can still move the hub out of alignment in both directions. I was hoping if I align the upright proir to fully tightening all the bolts it would actually want to stay straight anyway.

This is why you have to work from the centre line and not just put the brackets on the tubes. You would be better to make a simple jig that sets the correct alignment of the brackets then bolt brackets to this then put the tubes on.
if you have one side toeing in or out it will cock the whole thing up and will handle like a sack of spuds on a skateboard.

tack a tube on the centre line, use a scriber to scribe centre line and always work from that