Largest diameter leather-wrapped steering wheel ?

That's the one, non-airbag. Thanks Bondavi - anyone have one?

While I think of it, largest leather wheel in the Gen2? 425mm?

The smaller wheels speed up the steering, true. How this equates to better control, I don't know. After owning a W116, anything much smaller seems odd to me.

I do know that driving with hands at 4 and 8, the standard 420mm wheel sits in my lap nicely. The smaller Sportline doesn't work for me. YMMV, etc.