Yes I did, I’ve drilled through the rivets en was possible to pull the exhaust apart.
the next thing I did was to grind the DB-killer out (this one is welded tot the exhaust). when your careful enough you can only remove the weld en don’t damage the outer parts of the exhaust.
the one problem I had was the inner wool… once the exhaust is dissected you won’t be able to put the wool back.
the sound the exhaust makes isn’t that loud (you still have a major mid damper what will filter enough noise out).
the other thing you can do is to buy a ackropovic from a KTM duk 390, they have the same engine and frame.