Upsetting story looking for a solution

Can't your dealer handle the replacement? I managed to blow out a driver on my old V3s and my dealer swapped it out. Unless the construction on the Q series is the issue

in any case you do need to fix it, whether it affects the sound or not you have probably taken much more than $3k off the resale value. Chalk it down to experience and consider making a tweeter cover cover 😉 I use flexible plastic 1/4 cup measuring pots for whenever I move my Q3s to cover the tweeters and avoid this sort of mishap, masking tape them on and you are set

Also I remembered the covers are there because beryllium is very poisonous. You really need to keep your granddaughter away. 

Maybe I'm in a minority but I would be extremely unhappy to discover that a Q5 I purchased used had been "modified" by the previous owner. As I recall Magico spec even the torque to be applied to the bolts holding their cabinets together, even trying to take the thing apart risks scratches on the finish which again would materially affect resale. Given this is a current model and Magico offer great after sales service it seems insane to be DIY. Look at this as a fun time for your dealer to loan you some other speakers to enjoy while yours are back with Magico (and if you don't have this sort of close dealer relationship(s) at this level why not?)

Whatever you do I trust you will declare all this to any future buyer! Pity there's no CarFax for hi-fi