No, I do not use pins to secure the ganja. I get a small deformation on the ganja around the peksi, so that the ganja is firmly fixed. 
The same principle is applied in Japan to adapt tsubas on the blades. 
I am sure Alan has never seen such a system: it is my personal clumsy work to avoid the use of glue. In my defence I would emphasize that the result is invisible (also because hidden by the mendak) and reversible. 
When a pin is present, I obviously use it. If it is worn out, I make a new one.
		 
		
		
		
		
		
		
		
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