PTG Technical Exam action models

[Ken Jankura]

>In the Technical Exam, a single key, wippen and hammer assembly vertical 
>action model is used but the grand action model has three units.  This 
>provides for some minimal demonstration of evenness in such things as 
>repetition spring tension regulation, key level, dip and aftertouch.
>
>The immediate question arises however of how well using any model reflects a 
>person's actual ability to handle a real and whole piano.  The best that can 
>be done is that the applicant's every detail is scrutinized whereas in a
real 
>piano, absolute perfection in regulation might be as difficult to attain as 
>the same perfection in tuning:  it is somewhat elusive.
>

 My take on this is that regulating an action model well is no guarantee
that you can do a good job on an entire piano, but not being able to
regulate an action model well 'is' a guarantee that you 'cannot' do an
entire piano well.
Ken J.