Jessm - no, a zillion and 1
Most brazing compounds I know of are silver based, but still are usually called "solders" :shrug: Reason I asked though is brazing provides a better thermal and mechanical connection than soldering and if they are soldered and not brazed, I was curious about what they used
(glad I'm not a cat, I would have been dead long ago from my curiosity streak, lol)
Speaking of brazing, if you didn't care about having the top of the Maze3 removable, brazing would be a great way to put on a copper top (hehe, on topic again)