I've been fondeling new binos and on vortex especially I can't seem to get the diopter to move. 
Think the store would get upset if hooked a pipe wrench to them? 
Vortex viper hd 
Leupold bx wouldn't move either
I think the vortex viper uhd with japan glass was ok, it moved
Am I doin it wrong?  I need that diopter to move and focus!
And I got pretty solid paws, I can twist things, but I'm getting into break it territory here...