slightly pushed in softdome tweeter on Fritz speaker

This is exactly why I made slide-over speaker boxes from black matboard material for my Sonus Faber Sonetto V G2. I just slide them up and off to play and slide back over when done listening. They have saved the day from sweepers or knees, etc in tight entry way.

I hope I am not sounding rude but how about giving Fritz Heiler a call. After all, he made the thing. Will it affect the sound? Will it? Listen to it and tell us what you think. You have the fruit in your hand, tell US how it tastes my friend. 

I have used a pin or needle to pull out dust covers. Works well with fabric dust covers, I think it would work on a soft dome without leaving a mark. It's not necessary to push the pin through the membrane but more of a side stab and pluck. 

Blue Painters tape is the way to go. You most likely DO NOT even need to adhere the tape firmly, just enough to 'tack' on to the textile. Stay FAR AWAY from a needle. lol

While you're shopping for the blue tape, might I suggest some duct tape to and perhaps a rope to secure your wife in a room FAR FAR away from the Fritz's. ;)

It's just the dust cover, should have no bearing on the function of the tweeter.