Being matt black it's impossible to see anything. No reflections to key off. With the rubberized finish it has a little give and it's hard to tell by touch. There does seem to be a very slight bulge in the center of the base. It would only take a tiny amount of irregularity to make it wobble. It's the only mod I ever had that didn't have a metal base.
A little annoying but not a big deal.
 
				
		 
 
		 
 
		 
 
		 
 
		
 
 
		 
 
		 
 
		 
 
		
 
 
		 
 
		 
 
		 
 
		


 
	 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		