This instrument was taken apart entirely, thought out anew and assembled again differently; a kind of a musical laboratory.
The Weltklang baritone 3536 was bought with the clear intention to use it as a starting point for a far-reaching reconstruction. It turned out to be a project that does make it clear what can be gained when one starts from a point where there's nothing left to lose.
A weak point of these instruments certainly is their intonation. The bore profile is chaotic. We find unfavourable joints between pieces of tubing and a lot of relative widenings and narrowings follow one another. These faults cause serious intonation problems. Along with that the instrument sounds dull and stuffy because of a rather low key height and a narrow neck entrance. Changes were made to both bore profile and mechanism. Only very few things remained original.
There we go... An overview of the foremost changes made, from top to bottom: