here ya go...
lots of pics http://vagdrivers.net/forums/index.php?showtopic=23532
random turbo rebuild
after reading alot of stuff on the vw vortex forum and other audi ones they seem to have little problems as long as the rebuild kits good quality
if I remember correctly the factory only balances the shaft with the two turbines attached.. and since its not assembled in its housing first, as long as all your markings line up it should be balanced well enough...
would your turbos be coming from an S4?