Originally Posted by Al Austria
For all intents and purpose, it makes absolutely no difference where your flight controller is mounted on the frame. Provided that your FC is oriented appropriately, mounted flat and is properly indexed with the aircraft's azimuth, it will compensate exactly the same regardless of its location.
You can mount your flight controller on a stick stood off 10 feet to the side of your quad and it will fly fine as long as the stick is rigid and the FC is mounted with the above criteria.
Other than that, I really like the frame. Camera mount being isolated ought to work great. I'd actually suggest mounting the FC on the non isolated portion of the frame. In most cases, adding a mechanical means of vibration filtering to an IMU will actually increase it's control deadband as well as the likelihood for the system to drift. As long as your props are balanced, stock tape mounted directly to the airframe usually works best.
Just so everyone is clear the statement above is only true for gyro only fc. A fc with accelerometers is influenced by position. The DJI WKM has the ability to compensate for position so it can be placed anywhere and still use accelerometers for leveling etc.