I wrote to magma, and gave them the serial number, its a 13 port expansion, and does use a card in the computer. ...Its 399 for the host card and 100 for the cable......kind of steep, I'm going to keep looking on ebay. I got the expansion for 36 dollars, thats a steal i know, its an actual digidesign.....laylas , lol, Chris, I had 4 of those daisy-chained, in a pc, in a studio they actually worked awesome....That would be downright cruel to just sell the interface w/out a card lol, use it for door stop or something i guess.....Does anyone know, if that expansion chassis will work in a g4,dual 500 mhz,os 9.2? I've had the 888/24s a long time , but never owned a expansion chassis...will post pics tomorrow or next day, and the card in the chassis is still in there along with everything, all i need is the cable and the card that goes inside the mac.......wondering if its worth it though.....or if it will cause my system not to work as well, I love how reliable pt is once you get it dialed in os9, once you iron out probs it really works nicely.....