Hey John and fishwaltz! My drums are at my guitar player's house but, I believe the mount is a bit different. My second tom covers the mount as well. All I have is the triangular mount like yours and conical toothed piece which is part of the mount. The gentleman from whom I bought the bass says that he must have lost "the little piece somewhere". This was a few years ago. I have never even seen one. I'll try the old catalogues again and try to zoom in. Maybe that will help. Very interesting though. Brian
John, I keep going back to your attachment. Your mount must be identical to mine. I just wish I knew what the piece that connects the mount to the cymbal arm looks like!