I had a little wobble on my GS300 mk1, not severe and more annoying than anything else as it was around the 50 - 55 mph area, easy to drive through and all settled down again

so I had the fronts ballanced and the 50 - 55 mph wobble dissapeared

Now I have a wobble at 65 mph

the wheel balancer shows it as perfect

so my question is does the GS300 need to have the wheels balanced on the car, or is there a knack to sorting out what is an annoying problem or am i missing something here ?

Ideally balanced on the car otherwise get them balanced elsewhere and also get the rears done as well.