I got this reply from an email to Dynaudio
QUOTE
The SYSTEM 240GT is designed to built in 160mm EURO/DIN holes used in a lot of car doors. Normally you don't need the grill because it is included in the door already.
And also talking to Hutch, he suggested the following
QUOTE
Two things you can do, one, drill holes through the mounting flange to correspond with the grill (what most people do) or mount the speaker with two screws, mount the grill with the other two and cut off screw heads and super glue them into the holes in the grill frame. (not highly recommended but has been done before). Or, you could just make custom grill rings.
I still haven't taken the drill to my Dyns. Just too scared