Indeed.
I never felt the need for one in 40,000 miles of driving our 90 TD5 or six months of 300tdi ownership.
But my 110 was never as good. I did try to get it sorted but was unsuccessful. "Nothing wrong with it" l was told.
The missus now has another 90 TD5 CSW. The steering does have some self centering action but it's not as good as my 110 with the RTC steering damper fitted.