Nikon,
There not as many Audya ownwers about as SD1 and SD1+ so to a certain extent you are much on your own. The Audya manual is not very good but the KB is perhaps the best around. I had a SD1+ and you will find the Auyda a lot easier to save regs and get then back when you want. Why did the person who had it sell it. The KB is a massive programming tools so just enjoy all the things you can do with it, find out what version of firmware it as when you get it.
Tony
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Tyros 4/Pair SR 350/ PC with a i8 intel chip, XENYX 802, Ford Focus 2 litre/Tascam DR07/Brother printer/Designjet 500/ our Doris/5 Grandchildren/ white boxers short Kymart shipped over and Typhoo Tea Earl Grey