Larry,Thanks for your reply.You gotta bear with me in that I'm just translating what my prep tech is stating as for symthamatic problems.
The knuckle is 8mm so your above example applies as for one of the problems
The shank is a 16mm shank but coupled with this genuine Steinway wipp you have to raise the capstan a 1/2" which changes the jack position up or forward.
With a Tokiwa copy of a NY wipp/parts which we mocked from all the differnt part combination/manufacturers they felt the best in this piano.Had to actually lower the capstan a 1/2".My prep tech,Mike Farnell of Pacific Piano Supply and who distributes Tokiwa parts in the states said something to the effect that the wippen post is forward or different in some way on the Steinway part.The accelerated action he said has something to do with it.
All I know is that even bench regulated the piano plays BAD with these parts.
It's not a problem with the new parts that I'm gonna use which the Tokiwa or even the Renner USA seem fine but wondering what pianos or application were these parts for.
I read a short ptg. article last night which D Stanwood made mention that these Pre1984 parts from Steinway are wrong and should not be used period. I thought WOW! Just trying to salvage these near new parts for something.Appreciate any more insight from the pros.
PS Mike is delving into the stack as i type.We were only assessing the issues and symtoms yesterday.