Hey All, I have been reading about getting solo running on Arducopter master and seem to be getting conflicting information. On the one hand there is Philip Rowse and the green ph2.1 that is supposed to be released (soon) that should be able to run Arducopter master. However there are videos out there demonstrating solo running on master from over a year ago. See the following video from Randay Mackay running Solo on Master from December 2015: . . Another one showing solo running on master: . So my question is: what is going on? If I try to compile master and upload it to solo, how come it no longer works when these two examples show it working? Am I missing something in terms of the make commands? I have been following these two guides: 3DR Solo (Developer Information) — Dev documentation and Building ArduPilot for Pixhawk/PX4 on Linux with Make — Dev documentation. I would really appreciate some insight!