-> is there a similar explanation for the change from 0.486 in Pat's formula to 
-> 0.418 in yours? That is the basis of my claim that you were wrong. 
 
 
-> Jasen 
  
Last time, you said I'd changed it to 0.416. I guess we both have 
twitchy fingers. Is your telephone area code 418? 
  
I did erroneously change it to 416, which is my area code. 
  
                             dow 
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