How does everyone go about getting their tires balanced correctly?  Is there a certain type of balancer that one needs to find in a shop?  I recall reading that our wheels are 'lug-centric' or some such thing that I've not encountered elsewhere.  
  Usually, I use my own bubble balancer, have done so on my race car and street car wheels, but the vanagon rims, it doesn't seem to work very well..I get them close, about as good as my local Les Schwab does with their computer spin balance machine..Which is to say  that I still have irritating shimmy..low intensity..not too bad, but bad enough to try to balance them again, better.
  Any advice on this subject?
  Thanks, Don Hanson