Also I wanted to use the original 3.5 flywheel/clutch/starter to decrease the complexity of the project. The transmission input shaft/interface plate combination gave me enough pilot shaft engagement with the pilot bearing I did not need a custom flywheel with integral pilot bearing.

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Tony H
W111 280SE 3.5 Coupe
Manual transmission

Past cars:
Porsche 914 2.0
'64 Jaguar XKE Roadster
'57 Oval Window VW
'71 Toyota Hilux Pickup Truck-Dad bought new
'73 Toyota Celica GT