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Monday 12 March 2018 at 22:22
Quoted from 85vett:You can do one of two things.
I personally loosen them, install the mirror blades and then re-install them. This helps keep the mirror blades in place while installing them as well as holds them tighter against the cabinet.
On tighter games (less clearance for the PF and the cab)...
Source: http://pinside.com/pinball/forum/topic/anyone-know-what-this-is-from-inside-stern-cab-#post-4277284