For years now I have been recording many many tip openings and facing 
curves using the Eric Brand feeler set.  Is there a conversion factor 
to convert these curves to the more comprehensively accurate curve that 
use the feeler set displayed in the files section of this forum???

P.S. For Paul - The New York auctionhouse that sold Mulligan's gear 
listed about 3 Gale 3 dot Hollywood mouthpieces in good condition as 
well as one Silver and one gold plated Conn New Wonder Baritione sax. 
Needless to say they all sold for bankload of money. 

Yeah, he had the word out, he would buy any that could be found.  Apparently he had bitten all the way through the beak several times, had it filled in, and the side and tip rails of his mouthpieces were very worn to the point they could no longer be refaced.
   
  Paul

Greg Wier <gregwier@...> wrote:
          For years now I have been recording many many tip openings and facing 
curves using the Eric Brand feeler set. Is there a conversion factor 
to convert these curves to the more comprehensively accurate curve that 
use the feeler set displayed in the files section of this forum???

P.S. For Paul - The New York auctionhouse that sold Mulligan's gear 
listed about 3 Gale 3 dot Hollywood mouthpieces in good condition as 
well as one Silver and one gold plated Conn New Wonder Baritione sax. 
Needless to say they all sold for bankload of money. 



         


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> For years now I have been recording many many tip openings and facing 
> curves using the Eric Brand feeler set.  Is there a conversion factor 
> to convert these curves to the more comprehensively accurate curve that 
> use the feeler set displayed in the files section of this forum???
> 

It can be done but there is not a simple conversion factor.

The strategy would be to fit a curve through the data points gathered from
the Brand set.  Then you would need to pull the Winslow points off the
fitted curve.  The results would depend on what kind of curve you chose and
how close you want it to fit your Brand data.  A spline or high order
polynomial could run exactly through each Brand data point.  But this would
duplicate bumps and flat sections that may be defects, not features. 
However for clarinet curves, the bumps and flats might be features.

The spreadsheets on the Yahoo site mostly use a radial facing curve.  The
Brand data could be typed in and a radial curve fitted through the data. 
Then the Winslow or other feeler sets could be typed in to pull glass gage
readings off the radial curve.

  



       
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