Work is progressing well at the three institutes (Landessternwarte Heidelberg, Universitäts-Sternwarte Göttingen, Universitäts-Sternwarte München) collaborating in a consortium. Already in April 1992 the Preliminary Design Review (PDR) was held, and in February 1994 the Final Design Review (FDR) followed for the instrument mechanics, electronics, the assembly, integration and test procedures, for handling and maintenance aspects and for safety and management issues. No serious problems were identified, so immediately afterwards the consortium began to transfer the approved design into hardware.