with regards to RTH accuracy,i can confirm that the difference between using precision landing and not on my MPP is amazing ,if the tick box is clicked for precision landing, then the drone ,even if it windy will land back on the take off mat with uncanny accuracy if not then it can be anywhere within a 3 ft radius of the mat,although i very rarely use RTH preferring to fly manually back home, i did do a comparison test early on in my ownership of the MPP ,to see how good the precision landing was, i still tick the box when i take off in case i end up with an issue that would trigger a auto RTH i think it was a good thing to have on the MPP and its a shame that they discontinued it on the
M2P and zoom although i know its there as long as you remember to go up to 25 ft before you fly off