Bubble Balancer Fix

Interesting discussion. I too worked for years in a shop where we used this same bubble balancer. It worked 99% of the time. Only once did we have a customer come back with a high speed vibration. We had to send it out to be spin balanced which cured the problem. I appreciate your technique in "splitting' the weights. We took that one step further. Knowing that the imbalance can be on the inside of the wheel or the outside, we split the weight 4 ways. Whatever weight was needed, it was split 4 ways, two weights on the outside and two weights on the inside. It does work.