Hi Ian, >Is it all very expensive for a hobbyist to produce one-off boards for >experiments & prototypes?
Having one 2-layer board (in the size of a Q40 IO card) should cost about EUR 60 here. So a hobbyist with CAD software might find it useful to save the time he needs for wiring, and have himself a professional looking board. If I had more time, I would like to write a little tutorial on how to make your own Q40 extensions for QUANTA magazine. Peter