Here's an update. I went and bought a new Shimano/ISIS BB tool and removed the FSA BB. I also bought a Truvativ BB tool and put an older BB unit I had back into service.

The FSA BB isn't so rough when removed so I'm thinking that it was just from the BB cups being overtightened on fitting. I'll just have to resist the urge to tighten it that little bit more on refitting and see how it goes.

I had a hunch that a Token ISIS BB unit I had was the source of an anoying click so I put the Truvativ BB back into service. BINGO! No more click. Rather anoying actualy since I had replaced a super cheap BB with this Token ISIS unit which wasn't that cheap in the scheme of things so I wasn't realy expecting it to be the problem at first. I thought it was the cheap rear derailer out of alignment. Any way I'm glad the puzzle is solved.

Regards, Anthony