I fly a P2 w/H3-3D, iOSD, IRC 600, Hero+ Black and Black Pearl with BlueBeam Ultras and either Fatshark Patch or 5-Turn IBCrazy Helical. Trying to still wrap my brain around a few things.... RTH - after setting home point prior to take off I can flip power of Tx off and that will initiate the RTH feature. What is difference between that method and the one that can be programmed to the S1 switch on lowest position? Home Lock on S2 switch - this can't be used while in GPS mode, right? I really like the concept here as I was flying this past week and couldnt see the bird any longer (LOS) and would have loved to have used this feature. If it can't be used in GPS mode, that makes me a little nervous.....should I be? Course Lock on S2 switch - this CAN be used while in GPS mode and is a more effective way to capture quality shots such as a hole flyover at a golf course, etc.? Is it Course Lock or Home Lock that is dependent on which direction P2 is pointed as GPS sats are locked in and preparing for take-off? Thanks!