I am so glad I found this thread! My Compass (bought used here some years ago) are the Mk1 version and now one of the tweeters does not work anymore. Pear Audio Analogue in Ljubljana mention one Shahinian dealer in Austria, so I phoned him and also sent a mail. He said both tweeters would have to be changed for the MK 2 version, but he was not sure if these were available anymore. He recommended to contact PAA directly and also forwarded my mail to them. No reply, so I sent them a mail myself- again no reply. All this was December last year. And then came this thread, and all the parts are available, obviously. So John Burns seems to be the man, as many of you warmly recommend. I am really tempted to do not only the tweeter but also the bass driver change (although these are in good working order). Unfortunately, I am not as handy as Simon W, and part of this will have to be done be a dealer. But I will have to do the preparations myself (dissasemble the speaker, having the bigger hole for the new bass driver by a joiner etc.). I hope for advice from John Burns and the experts here. Thanks in advance.