On my truck stop I used flipper fidelity speakers for a system 11 machine. They turned out to be larger diameter. Mounting tabs Overhung the cabinet inner size. I mounted to the cabinet and made a filler panel to hide the light using the old mounting wood. Used the old mounting holes in the old panel to create new larger holes in the same locations in some larger firm material that is normally used for picture frame borders. I just did this last week.