I finally got the Severinsen that I had been after for my son , and am very, very pleased with it. Only one item that requires attention, and that is the second valve slide. One, it is stuck, so I will take it to the shop to see what they can do with it. Secondly, as you can see from the attached picture the 'nib' or 'nub' or whatever you want to call it is missing. I don't want to slap any old silver plated replacement on there, so can anyone recommend a source for the correct part, be it a 'nib' or the while slide? Thanks!!!!