noticed on eBay a single 24 chan adat card for the HDR,
http://www.ebay.co.uk/itm/Mackie-OPT-24 ... 2712wt_975
I have never seen one of these before, so this would free up 2 spaces so could you add another card ? If so how would this work if you added 2 analogue cards would you then be able to record opticly or analog to the same channel ?