Ok, I have an otherwise stock daily driven '07 S60 2.5T Fwd, just over 100k. The car is garage kept, well maintained (im a tech) I do plan to do upgrades soon (19t, tune, fmic, downpipe, etc.) but noticed during 120k service the crank pulley wobbles. I work in indy shop and can get a good deal on stock Volvo replacement but am interested in some lighter pulleys such as what Lucky is offering at ARD. I'm not interested in underdrive. I'm concerned about the actual "balancing" that the stock one is supposed to offer and bearing wear, etc. Can anyone offer advice? Perhaps real world experiences, pros/cons. thanks in advance.