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Kinda late, but I just happen to be checking-out this thread to see shift *****.
Apparently the SD has a special **** that's fully Walnut veneer (no leather wrapped sides) with finger indentations carved into the front and a tall beveled metal skirt (lower bezel).
Now you know.
The ***** are essentially the same in design, however the SC430's **** sits a little bit lower. I once put an SC430's shift **** on my old GS400 and the chrome at the bottom of the **** would touch the shifter bezel whenever you put the car in park.