Interestingly, I also have a King 2341, though an older one. I agree with the ease of intonation, but for me it is ergonomically a nightmare. Moving the lead pipe helped, but it is definitely a compromise.But - when I go back to my normal horn (new King 2341 BBb), it's like "going home". Suddenly everything is easy - like playing in a rocking chair.
My son just reminded me of a 3-valve Reynolds horn that was a top-notch candidate for defenestration. Beat-to-tinfoil, and nothing much to begin with, it was a middle-school loaner. As he was learning to play, I let him use my horn, and I struggled with the at-best- marginal beater. It evened the playing field a bit, kept the duets interesting, and made me grateful for the public schools that even own tubas.



