Hi, I got my P3S second hand, for a good price (about 600$ SH, was 800$ new) with a extra battery. It had only 3 months and a half. I bought it 3 days ago. It still has warranty, bought from a local dealer. It came with 1.6.80 and it only flew 30m high and 100m away, before it was lagging video and showing RC Signal Lost. I downgraded to 1.5.70 on the drone, so it is showing 1.5.70+ in the dji go app (i read that the RC remains with 1.6.80). I can go about 60-70m high now and about 200-250m away. So that is much better, but less than i was hoping. I contacted the guy i bought it from and he says he did not have any problems with the range and he even sent me footage to prove it. He was using IOS and i'm using Android, but i don't think that is the problem. So, is there a way to downgrade the RC too? I read everything i could these few days, looks like the answer would be NO, but maybe i'm missing something. Should i stay with 1.5.70+ or try to update to 1.7.80 beta? Can i further downgrade it? I know there wouldn't be any garranties, but what is your experience? Would it be better just to leave it as is, until a stable firware version and just mod the RC for better range? I guess i could also send it in for a repair under warranty, but i'm preety sure the drone is just fine, must be just the firmware.