You can add me to the aluminum danforth (FX) official hater list as well.
When I had my Parker 23 DVCC I played the aluminum game. The FX11 will not fit the anchor locker tray. Didn't care for it's performance or straightening it out constantly either.
If I had to make a suggestion to the OP it would be to either use an anchor ball and keep the current setup he has. Or, get windlass and 22# Delta.
With a windlass, use the boat length as a guide for chain length.
Using the anchor ball, I would go with about 15 ft of chain a little heavier than the 1/4 g4/bbb stuff. The ball will lift it just fine.
I'll see if I can find a link on using the ball.
Found the "redneck version" and it's done correctly. http://www.youtube.com/watch?v=_nxM7VPOC4M