Has anyone got any info on pured shafts and spine aligned or are they the same.If so how is spine alignment carried out. What benifits does this have over stock shafts .Surely shafts are not manufactured with much tolerance and every shaft put in a driver will have different playing characteristics.

Check these threads -

http://www.golfmagic.com/forum/forummessages/mps/dt/4/utn/8433/last/1/V/1/SP/

and

http://www.golfmagic.com/forum/forummessages/mps/dt/4/utn/9499/last/1/V/1/SP/