By the way, we've no intention of keeping the cable pinout a secret. Remember that it costs us money to send out those 'free' cables, so if someone wants to make their own, we're not going to complain :-) provided they don't call us for support when their home-made cable doesn't work, of course...

Last time I spoke to a hardware engineer, he was going to double-check that Pronto couldn't be damaged by an incorrectly-constructed cable, but that's about the only issue I can see.