Guys- Can someone with a 200c please measure the distance between the outsides of the cutouts for the two bass units? I need to make a cutout for a new grille as I'm mounting my centre INSIDE my fire surround, which I'm modifying to accept the speaker with a new grille. As the drive units don't extend to the full width of the speaker, I should be able to cut down the size of the grille to just the width of the drive units. I'm using the 100c at the moment, which is ported. Will this affect the performance of the speaker unduly? I plan to upgrade to the 200c as funds allow,which is a sealed box, so need to modify with the 200 in mind. L&R are KEF Reference ci2000 in walls PS, I've not heard of anyone trying this, does anyone think I'm mad apart from the other half?