I picked up the wheels after balancing yesterday - they appear to have even more "lead additive" than when I took them in...

I was hoping that this was going to rectify the vibration problems at between 80-100 kph...but we all know that this just wasn't going to happen, don't we?
Fitted them to the car with the newer tyres on the front and headed off for a test drive up the Bruce Highway in order to be able to legally do the required speed.
All went well at the suburban speeds (60-70), and I thought that it was going to be money well spent - sadly, not so and the vibration came in at around the same speed that it had before the re-balancing

My thoughts are that it has to be the rims as the car has no issues when fitted with any of the other three sets of wheels (16" and 17" - don't ask!) that keep one another company in what was intended to be a garden shed - but now no room for any more wheels...except for some which arrived over the weekend (see below)
My drawing board is worn out with all of the re-visits to try to make the car acceptable to "she who must be obeyed". I'm reluctant to outlay any more for new rubber if the rims are the problem.
Now, time for a laugh at the expense of "the old guy"
My search for a single NB8A rim resulted in a run to Nambour and back on Saturday morning and my Gumtree bargain turned into more space consumption for the bulging "garden" shed, as when I placed the wheels alongside one another there was a small discrepancy (about one inch as it happens) as the size turned out to be 14" = NA teardrop wheels.
I can feel a "Four X" coming on - that should read "For Sale"
Aargh!