Hi John, no probem at all my friend, all opinions welcome here...:)
You are right, about destroying good sound. As I matter of fact I am only 29 years old, I have been in this hobby since I was 20. And I alweays have in mind what you said (When you reach Nirvana watch out, so that you dont lose it)...And I think I have reached it. You are right, noone can be sure that I will have a better result by changing the tweeter, I am just very curious about the result...
Happy Listening,
Mike