Changing the wifi band in .0900 fw seem not working properly, it'll revert back to 5.8g after restart...you need to downgrade to .0700 fw for full control wifi channel and band
Sometime small plane and heli will be flying below 400ft/120m depends on the cloud ceilings,so its our responsible to drop altitude immediately even we're below 120m when there are manned aircraft's flying nearby...
Its pretty stable flying indoor with opti mode,props guard is a must,turn off obstacles avoidance sensor and flying L.O.S...never hit the RTH button indoor