Great thanks, I had my phone mounted to the left side of the hand rest on my transmitter tray and got to thinking about how far from center of tray that was so I played with it with a small level sitting on the screen and it took a lot to trigger the call so I moved it to the top of the tray on the center line .
Boy what a difference ,it takes much less to trigger it in roll and I was able to get it to work in yaw as well. The backing up is some better in 4 flights it backed up once 3 times on roll and none on the yaw flight.

So in my non scientific study mounted on a tray it likes the center line a lot better than a side offset I started with.

Thanks Kirk