"non" Knuckle to Jack regulation

[Scott Jackson]

In searching the archives, you will also see them referred to as Thayer
knuckles.
http://www.google.com.au/search?q=thayer+knuckle+site%3Aptg.org
<http://www.google.com.au/search?q=thayer+knuckle+site%3Aptg.org&btnG=Search
&hl=en&lr=&as_qdr=all&sa=2> &btnG=Search&hl=en&lr=&as_qdr=all&sa=2 
 
Scott Jackson
Mt Keira, NSW, Australia. 

-----Original Message-----

Rex

This is called a "pear" knuckle. If I recall, (I haven't done one of these
for many years), the jack is aligned to the back edge of the "ledge". 


Willem (Wim) Blees, RPT


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