This is a much better solution. 
I would just make the bases of the buttons thicker, which is essentially what your doing with the oring, bit I have to accommodate for all the different batteries, different 18650's are different heights, not a lot, but enough to make a difference. Go with the orings, much better.
Thanks for the info on the bottles, I am sure they will fit in the new micro mod,
	
		
			
		
		
	
			
			I would just make the bases of the buttons thicker, which is essentially what your doing with the oring, bit I have to accommodate for all the different batteries, different 18650's are different heights, not a lot, but enough to make a difference. Go with the orings, much better.
Tbev, glad you're feeling better, I love the new models & engraving options available... as for those Italian bottles, CH just bought 30 for $175 shipped by DHL, personally I haven't had any problems with the current bottles, they're plenty soft and don't leak unless over-tightened.
IIRC a couple months ago someone here mentioned using O-rings on the button to shorten the throw, I found this to be an easy solution since I have a large collection of them. Remove the button from the top and slide the O-Ring down to the base of the button, replace & test... problem solved without bending the Copper bar, and eliminates the need for a magnet in most cases.
Thanks for the info on the bottles, I am sure they will fit in the new micro mod,
			
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