| Try Zaja Blue.
Eclipse have tight tolerences on their valves and it's what they recommend. Interestingly my Eclipse and Schilke work fine with Al Cass or Zaja Blue (requires less oiling with the Zaja and they are quieter) but my Besson Cornet gets stuck valves with the Zaja! My old Yamaha used to get stuck valves with Al Cass but they worked like a dream with Zaja. This leads me to believe that it is horn dependent so as you are using Al Cass give Zaja Blue a go and see if it works. The Black stuff will go away after regular oiling - just oil once a day until it goes.
Graham |