Rear wheel rim out of line

Following on from Megagobby's thread about his front wheel not lining up properly, now it's my turn

I have had my 390s wheels rebuilt and the front is fine, however the back is not perfect. The sprockets are in line, but the rim is 8 mm over to the left of centre. I took measurements before I stripped the wheel down and gave it to the builder, so either I did these wrong or he has built it wrong.

The tyre clears everything at full suspension travel, so there is no danger of the tyre hitting the rear mudgaurd, but I am still a bit worried about it.

Should I have it re-done by the wheel builder or will I just not even notice it when I am riding the bike?

It is possible to loosen spokes on one side and tighten them on the other to move the rim. If you want to send it out go ahead. I take four pairs of spokes at 90 degrees apart and use those to get the rim where I want it and then tighten the rest of them and then go around and tighten them all. Usually about the time the wheel bearings need changing I take the nipple off the spoke and put never seize on it one at a time. It seems the new set up is goint towards aluminum nipples at the rim which I have my doubts about for future owners.