> ehmm Dieter 'invented' the eurorack standard..

Not really. The format of the front panels, frames and cases was an industry
standard a long time ago (e.g. used by Schroff). But in this standard all pc
boards were 100x160 mm (so-called Euro format) and a very expensive 64 pin
bus connector and bus board was used (only the bus board was ~ Euro 150). We
changed to a simpler bus board (the A-100 bus) and replaced the fixed pcb
format by a free format combined with a flexible ribbon cable for bus
connection.

Best wishes
Dieter Doepfer