I'm set up in a large attic space, with high ceilings and bare walls.
There is the problem right there, bare walls.
I had a love hate relationship with those tweeters. They throw a really wide image, which can be a good thing and it can be a bad thing too.
In a well treated room and good electronics especially tubes, they can be incredible.
But put them in a real lively room and they can burn a hole in your head if your not carful.
I have had good systems on these that sounded great and set the same system up in a lively room and not be able to stand it.
Fix the room first, then I'll help you tame the tweeter further if needed.
They may already have Axon film and foil caps on them. These are not a bad match.