Both the '54 and the '61 +4s have retained the damper blades in their normal position with the SSL bearing above. No shimmy or St Malvern's dance at any speed.
The Roadster has some shimmy, but the damper blades removed some time in its history. You can see the small bolt holes in the chassis and marks where the blade guides were. I think, but cannot be certain that they were removed when it had a Rutherford kit fitted, but don't this as gospel.
Tony
