I haven't seen an Addvance with FCS Fins. Are they available. YES THEY ARE !!! JUST FOUND THE ANSWER
Not that it bothers me too much but I am about to order another board and I seem to have boards with both FCS and Futures but want to move to one system across the quiver. I probably have a wider selection of FCS fins but an ADDvance will always be part of my quiver so if it doesnt come in FCS it is Futures all the way!! I actually think Futures are a better system.