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					Originally Posted by kai
					
				 
				Hello Detlef, 
 
... I'm not convinced the thinness of the wide part has an important functional reason; one possibility would be to increase cutting ability near the sweet spot. 
 
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 I concurr, it's just adding weight to the tip to increase the cutting impact of the working area, much like the adding of a 'yelman' to the newer model shown in the thread.