it's removable 1.5mm hex comes off just like the Sopra...KJ West One in London has a few pics of the tweeter grills removed on a pair of Scala EVO's. the Sopra's and the Evo's were designed by a German woman to look more masculine hence the matte finished accents, now if Focal offers custom finishes like the Scala V2 I'd have the tweeter box painted gloss black and the plinth
https://twitter.com/kjwestonelondon