Yes my RC has mods, but my AC is 100% stock. Personally I don't like using an older app, my thinking is you might be missing out on improvements and added safety features that the newer app has. And also the most up to date FW was probably designed to work hand and hand with the most updated Go app and vice-versa. Have not read much about any issues with 3.0.1, you might want to try re-installing it.I have a bit of a problem. I love to read of success and great distance - but then I read the P3S is not out of box and has modifications.
Mine at present only has Icarus SW mod, I downgraded Go App to 2.9.1 as 3.0.1 was unreliable and a Windsurfer .... but I have ArgTek system on its way.
An interesting thing happened other day when I first used Windsurfer with my Prestigio Phone.
If I had the phone in holder at good position to view ... basically dead above the left stick and partly behind the Windsurfer ... I lost connection. If I removed phone and moved it in front of Windsurfer connection returned ... so I had to fly with phone more forward than I wanted to keep connection.
Nigel