I pre-wired my house for a lot of low-voltage applications. I installed new-construction green plastic boxes of the appropriate sizes (e.g. 1-gang, 2-gang, etc.); at the time, I wasn't ready to finish, so I placed cheap blank wallplates over them - which fit perfectly.
Fast-forward, and I'm ready to complete the wiring. I bought a bunch of Leviton-brand wallplates with the "Decora" rectangular cutout, and several appropriate snap-ins for the cutouts. These Leviton things are sold everywhere - as far as I knew, they were a standard item.
Here's the problem: the spacing between the mounting holes on the green plastic low-voltage boxes is 3.25". The spacing between the screw holes on the Leviton plates are 3.75". Has anyone else run into this problem? Do I have to tear out the plastic boxes that are nailed into the studs and replace them with some special retrofit box? How do I make this work?