Have any of you ever replaced Magnepan 1.7 or 1.6 tweeters?

It's looking like I might have a problem with my Maggies. A buzzing/crackling in the range of 4k to 8k happens when the music gets more intense, most easily to male voices, when multiple voices join in on a chorus.  The problem just started about nine months ago, but now it's getting worse.  I have checked/replaced everything in my system and wiring and have come to the conclusion it must be the Maggies.
I have never looked at the socks or the staples, much less tried to remove them and work on the speakers.  I am pretty handy and own a wide assortment of mechanical and woodworking tools.  
If you have replaced your tweeters yourself please share some insight.  As I understand it, removing the socks and putting them back on is the most difficult part.  Is that so?  Sounds tedious, but not necessarily difficult. 
How are the tweeters attached?  I would be buying replacement tweeters, not trying to repair my current tweeters.  Are they glued on?  Any trick to getting them off & on?  How do you insure they are down tight and will stay tight?  Any special prep work?  Do you just solder the connections together using regular solder?  I read somewhere there is a special solder you should use.

Lots of question.
Thanks 

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