I like the overall design down to how the caps are clamped on.

The spit valves look to be well-designed with rubber seals.

If Tromba develops and improve the design they could change the paradigm of plastic over brass as the standard for the best flugelhorn

However, where the G is supposed to be, is actually a slightly sharp F# (concert E)

let’s me use the 3rd valve trigger to adjust my C# s etc just fine

And the top line f and g were impossible to tune