So I finally went ahead and changed my tyres. (After saying that I was going to wait for a fix so that I did not cloud the issue??)
Just wanted to get that in before you did!???
After a great deal of thought, I've put on Michelin Pilot Sport 5s, which suits my driving style and how I like to use the car.
First impressions straight out of the garage are that these are quieter and more compliant than standard.
But the big question I wanted to answer is...........
Are the vibes gone?
In a word....... No.
Much reduced? Yes.
Further up the speed range now, so that I can feel them at circa 70mph, but not 75mph.
To be absolutely clear, barely perceptible now, so the OE tyres were definitely contributing.
My money is now firmly back on the driveshafts not being perfectly balanced.
I'm pretty sure some folk (as has been said on here elsewhere) don't feel anything at all.
Previously, I could feel the onset of vibes from about 58mph up to and including about 75mph.
It wasn't terrible before, and IMO, I could definitely live with it (and did so)
As I've also said elsewhere, we all tolerate things differently so, one man's (or woman's) gentle vibe, is another man's (or woman's) cattle grid.
So knowing what I know now, would I have changed them anyway?
Well, having done the best part of 4k on the OE tyres now, I would have to say yes.
But that is just personal preference.
I do like to exploit the performance available (when possible) and will have to wait until Ive put a lot more miles on them to be absolutely sure, but I do expect them to let go, much later than the OE tyres.
I've also got Pembrey Circuit near me and these tyres will be much better suited for the track days I'm planning next year.
So, if MG do come up with a fix?????? then I will be happy to let them "apply" it.
In the mean time, I will continue to enjoy every minute of driving this car, and administering lessons in physics to the "yoof" who do insist on trying it on.