Quoting Mike Collum <collum@VERIZON.NET>:

> The stock north American grilles used 1/4 turn screws whereas the SA
> grilles use studs or attached pins that push into those old
> receptacles.
>   I've read where some have had to pry to remove the SA grille and are
> concerned about breaking it.
>
> I found that I could insert a screwdriver shaft between upper and
> lower
> parts of those receptacles and gently pry them apart to the point
> where
> they securely hold the grille but prying the grille off isn't
> necessary.
>   Mine now pulls off with just the right amount of resistance.

If I remember rightly, the two (or was it one?) fittings between the outer
pins can be exchanged for the German turn-fittings.