Do the old style bubble balancer work

[Kube]

Originally Posted by Don

Picked a bubble balancer up at Hershey a few yrs ago but have never used it,have the wheels off 35 and Might do a check ,..I do have a viberation problem at certain speeds ,,Have had them balanced on a computer but still not satisfied,
Found the instructions on line,and have some weights laying around,,

They work but are not nearly as accurate as modern "spin type" balancers.
Did you ever check each rim for runout?
If they are not true, that will definitely set up a cause of vibration. I'm not certain what maximum runout is specified for your rims. Some modern cars can be held to less than .005".
If you are running radials, they too will can set up the conditions for vibration. Especially if your chassis is not top notch. Poor shocks, loose front chassis components, sagging springs...can all add up to what you are experiencing.
I'd start narrowing down the issue by checking the rims for runout on the car.