SV: Odd pin block

[Ron Nossaman]

>        I think "did" would be the more proper tense.  I have only seen this 
> on older models.  I have seen it on a Hagspield and a Wolfframm.  these were 
> both older German pianos.  
>  
> Ed Foote RPT 

Ed,
Got a ballpark figure on the pilot hole diameter? It seems 
weird to me that a first pass would be drilled through, while 
a second pass would not. What's the evidence of a second pass, 
such as obviously under 1/4" (6.36mm) for the first hole?
Ron N