I manage a firestone store in Texas, and we do not have the tool to balance like that, but there is a machine that everyone will probaly be switching to that will tell us if you have a bad rim or not. I suggest to my customers that have this problem to go to a place where they balance on the car, if and when we run into this problem. If they said they had some trouble with a rim, there is a good chance they may have seen the rim"jump" while it was spinning. If this happens, you may get it close, but you can't balance an egg.
69 x-11..LS1, 420.88 horse to the tires,750 Holley Ultra DP, Torquer V2, darksides headers, PRC heads, 10.8:1 compression, forged bottom end, 5 speed. 2008 King Ranch F150 4x4.