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Would anyone happen to be able to make me a Martin Sousaphone Neck and bits? I’m looking into buying one but it does not have these parts.

I don’t have the instrument yet, but I’ll look into it. Does the horn seem to sit at a normal angle? I just don’t wanna get a conn neck, it be a different shape then the Martin ones and it makes the horn sit weird. Also do you know if it plays in flat or sharp or in-tune with the conn neck?