Okay, I have downgraded to fw .700 and flashed it twice. You have to go on firmware version at a time 1000 > 900 > 800 > 700 and then flash. Between each firmware drop, restart the bird.
After downgraded to fw .700, you check the box for altitude removal and apply, the values will write to the bird and then complete.
Here is the catch, the software will still show the box for max altitude and will not allow you to go above 500m in the box, but the bird will fly above it.
I just verified this completely and satisfactorily this weekend and was easily beyond the advertised 500m.
Can someone confirm this...I was about to buy this but checked fourms first. Im thinking tjis was a good desicion...I think if the op could confirm this id probably buy it. If not then ill look into other options. What a crock of BS if it doesnt.
Thanks in advance...