Downbearing Error - solution

[Prof. Euphonious Thump]

Humidity increase ???
    T
--- Richard Brekne <ricb at pianostemmer.no> wrote:

> Hi folks
> 
> After a restless night thinking about the prospect
> of recapping I 
> remeasured my string offset angles today and
> calculated out that I have 
> about 2.5 degrees in the high treble and just over 1
> degree in the 
> bass.  Not quite as bad as I had thought after
> all.... but still too 
> much.  As it turns out I can get down to just over
> 1.3 in the top and 
> close to 0 in the bass by taking a piece of 5 mm
> thick hardwood (the 
> sticks they send with shanks from Renner as it turns
> out) and form them 
> to match the contour of the plate just in front of
> the hitch pins.  
> Fashioning a string rest with some thin felt brings
> up the back length 
> to levels that I can easily live with.
> 
> I am left thinking however that something ended up
> different from when I 
> had the soundboard and bridge clamped and screwed
> into place.  I layed 
> out the bridge and got the height where I wanted it
> at that point... and 
> proceeded to drill and notch the bridge on the work
> bench before glueing 
> it to the soundboard.  But when I glued the thing on
> and the soundboard 
> into place the bridge surface was higher.  How can
> this have happened is 
> whats bothering me. 
> 
> Seems safer (tho perhaps more cumbersome) to glue
> everything in place 
> first and then do the plane down the height, do the
> layout, drill and 
> notch the bridge.  How many of you folks do things
> this way.. and if you 
> do it the way I did this one... what could have
> caused the error ?
> 
> Cheers
> RicB
> 



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