There are a lot of areas covered in this conversation that is only 22 posts long. That's how difficult a Flying 200M can be.
To add to this (as some have alluded to), the best advice I got from a former world elite racer and coach: "The Flying 200M is not a 11 or 12 second effort. It's a 1 minute effort with the last 200M being timed."
Look at your files from F200M and see what he means.
When I started looking at it that way, it opened my eyes a bit and showed me that I was spending waaaay too much energy in the wind up with not-enough left for the timed bit.
Also, being that it's a 1 minute effort, the work you put into the windup (or save during the windup) affects the last 200M.