I can't seem to find anything on how to set up Home Lock on the Phantom 4. I have a P4 - NOT a P4 Pro, not a P2 or P3. It's a PHANTOM 4. There are loads of YouTube videos showing how to set up Home Lock on Phantoms 2 and 3 but I cannot find anything on how to do it on the P4. And it makes a huge difference, because the RC for the 2 and 3 is not the same as for the P4. OK - here is the specific problem. I can go through all the steps involving the GO App. However, at one point, the older videos tell you to "change the flight mode from P to F", using the flight mode switch on the controller. The thing is, there is no "F" flight mode on the P4 controller. There are only three flight modes: P-S-4. What should I do with that? Leave flight mode on P? Switch to S or 4? Any thoughts?