Would it be possible to set up a simple system to create plugins for custom flight modes? Basically just a basic API for .dll-type plugins that exposes the flight controller data (accelerometer, gyros, etc), in-game FC settings (PID values, horizon strength, etc), and allows you to write custom loops/etc that permit experimental flight modes.

I'm looking to test new flight modes, for example: Horizon or Level modes that only apply self-leveling to the roll axis (not pitch axis), or a mode that allows me to mix Throttle control with the Pitch control using gyro data.

I obviously haven't looked at your source code, but Unity is generally very friendly toward this sort of thing, so I'm hoping that it would be pretty simple to set this up.