Action spread

[Byeway222 at aol.com]

Hello List,
Some months ago I posted on a 12 yr old Petrof Model 1 which I bought  and 
have lent to a church for recitals etc.  I have done a lot  of normal routine 
work on the action (centers/key bushings/fine  regulationetc.)  and have 
improved the touch considerably and it is liked  by pianists.  However, as a pianist 
myself I know that the feel of the  action is still not right and I intend 
working further towards bringing it to  full potential.  As soon as I have 
further access to it I shall bring the  action home and, amongst other things, put a 
new set of Abels on it.  Key  weighting is very uneven also.
One curious observation is that the action spread, which is 15mm,  creates a 
situation where the drop screws are engaging at the tip of the leather  pad on 
the wip balancier and not in the middle.  I don't really see why  this would 
affect the touch but I have not consciously seen a similar  situation and it 
doesn't look right.  I am wondering if a fundamental re  think is needed on 
this action.  If you think about it, to 'correct' this  situation  (new Model 1 
has a 12.5mm action spread) it would mean that the  wip rail would come 
backwards (towards the balance rail) to line up  the drop screws and leather pads.  
BUT, this would throw out the  capstan/lever heel relationship.  What I am 
asking is, does this  suggest the the capstans are in the wrong place to start 
with?  
In order to find the correct position of capstan on a key, can you actually  
work backwards from correctly positioning your standard Renner parts into 
their  proper realationships (using wip rail positioning, jack angle  etc) and 
then assume that the capstan position will automatically be right  if it 
corresponds with the centre of the wippen heel.  Would an acceptable  'magic line' be 
the result?
 
ric
 
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