"hello, thanks for your reply,, 
the crash landing was about 8ft from the ground.. it flipped upside down..nothing were broken...its like the calibration is off..
it hovers ,, but ever so often you get a twich .in the motor.. ,it can ascend very…"

"hello, , i gotten it installed,, and i had to use the latest flight tools..
its much better,, i used to have unlocking problems, gps problems, and esc 
out of sync. problems,, but since i did it. it worked very good.. very stable. .and unlocking…"

"Jun kyung Bang said:
oops forgot to download it and try the firmware. sorry about that.
And I guess you found the right firmware for your big shark cx-20.(congratulations)
and you are facing a new problem.(this was common to me) 
Reading your…"

"Jun kyung Bang said:
Think I found the v2 firmware for cx-20
http://www.fly-shark.com/Product?id=SharkX&&Inf=Download#
if the link doesn't work, visit the fly shark's web site and go to downloads.
For addition, your flight controller is a factory…"

"hello thank you for your info.. but i downloaded those files before which is  :SHARKX8 V2       the single file is named sharkx8.sfw,,, but i cannot get it to install ..no tool to do it..or see the quad...also  GPS HOLD WORKS,, IT holds the guad in…"

"hello thank you,, i tried all those videos before.. ,but it will work,, and by the next time i try to use quad.. is either 2 props spinning,, or tilting .. i have to do the DANCE,, AND recalibrate  transmitter again , and again ,, 
that sucks,, i…"