Some of you guys may already be aware of this, but for those who are not...I just had new rear tires put on my NSX at a local tire shop....The service manager loved my car and invited me to take a look at their new Hunter balancing machine (it's one of three in the state right now)...The machine uses mounting hardware that matches hub weight and lug patterns for virtually every vehicle on the road...During the balancing process, the equipment checks sidewall stiffness/flex and tire and rim roundness. It can actually pinpoint whether the rim or tire is out of round. A roller is used to apply road pressure during the balance and the video display indicates exactly where to place the weights. The machine can also be programmed to avoid placement of any weights on the outside of the rim....Basically, if you have had vibration problems, you may want to locate a shop with this new equipment..The service mgr. told me that several dealers in the area were sending them their problem vehicles...My results: Tested up to 130 and it was rock solid.