Lots of info on an "airsoft tire balancing" google search. I found a chart for the amount of weight for commercial beads and measured out the equal amount in BBs. I have my own tire machine, I just dumb x amount of BBs in before I pop the bead. Pun intended.

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'86 300 SDL '83 300D Astral Silver/Blue
354k miles.. 326k miles..

http://www.peachparts.com/shopforum/...ine=1310252049

Well I had never read of this before and learned something new.

Here is one site. It also has a reference to where you can look to find a chart of how much weight of media to put in (although the weight of media is for their producth that uses ceramic balls).
http://4x4trailhunters.com/tech/read/18
How much media to use
http://www.innovativebalancing.com/tirechartmap.htm

This is something that I can actually try out. I have a Harbor Freight manual Tire Changer.

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84 300D, 82 Volvo 244Gl Diesel