CDFhorn has added a number of mouthpieces to the Database.
https://www.horn-u-copia.net/mouthpieces/index.php
Additionally, I have modified the display so the user can select either the maker, the instrument, or both.
Books
General Topics
More Mouthpieces Posts
As recommended, many of the new pieces were scanned by Vennture and can be seen at https://trumpet.cloud/mpc - both tracings and even info pages in some cases, plus a new-and-improved spec sheet section with detailed measurements from VennCAD