Echo cornet

The newest project I'm about to tackle is crafting a replacement echo bell for this cornet.  The cornet is in perfect working order but the echo bell and slide has been lost over the years.  Luckily a repairer friend of mine had one almost exactly the same come into their shop recently and so I was able to get some accurate measurements as a starting point.  Really looking forward to this challenge.  I'll update my progress as the project continues.