940 & 960 7/9 steering splines.
I have two different sizes of steering shafts in my 9-series cars: 19mm at the splines (91 940, non-airbag), and 23mm (96 960, airbag).
I had thought that the difference was non-airbag vs airbag cars, but cannot confirm. Certainly none of the ebay sellers seem to have a clue.
Any pointers in how to buy the correct steering boss for a 91 (non-airbag) steering column?