Strava Compatibility

Has anybody been able to generate a .fit file that successfully integrates with Strava?  I realize that Strava has the ability to manually upload a .fit file, but does anybody have insight on what units are available?

I have created a Treadmill control app, I can generate instantaneous speed, incline, and METs-- but I would like the ability to publish all this to a user's Strava activity feed.

Chris