No worries, I wasn't even thinking about that. I was quoting the guy who quoted you.
You are correct about function and benefits too, I just wanted to point out that there are good reasons that the duratec FD was put in by Ford, and good reasons to leave it in too (like no additional headaches).
It is a good option for someone with a high power car, LIKE YOURS, or someone who travels the highway a lot and wants better economy.
All that being said, I wouldn't trust myself doing that swap on those gears unless I obtained a few more tools. I can't see the normal DIY'r doing that one.
