The late Jensen once told me that he had the drawings for all of the professional Durst enlargers. I know that he made 12 L200's for a university darkroom, completely accessorized.
10 of these he sold to us... 2 of them without heads (multighgraps). I hope now this ace-all forever install 12 m rail set of 2506 Durst enlager that he cheated with installation.