Dear All,
 Posting some pictures of my stock Walkera qrx350pro.

Its like the "peoples quad-copter" does what you want it to do, its like a reflex in your muscles.

When I first planned to get a quad, I was jumping all out to get the new Dji Vision 2 and believe me I would have got it. But at that price and not sure of my skills I went back to reading reviews of the Walkera qrx350pro. As usual, there are no proper reviews, its all about each individuals experience on them, some just hate it, some love it.
But then, there was one small advantage on this quad, "Mission Planner compatibility"
This opened many doors to my doubts.
Like the videos, which showed the quad falling from the skies had a lot of negativity, but that could be solved through Mission Planner.
The follow me or circle could be set into it. But the best of all was the way points.
Man, you can set this thing up at home, go to a beach and at the click of a switch take off, fly around and land from the original spot and all this without bothering.
In the initial stages of setting up the quad on Mission Planner, my experience was not a good one, thats because, I tried to change settings which were out of my understandings.
But then again, I made a back up of the original parameters, so I was free to try on new things.
Always remember, if you tweaking your quad on MP

The first rule is to "MAKE A BACKUP OF YOUR ORIGINAL PARAMETERS"

To solve the problem of your quad falling from the sky when Low Voltage Cut-off (LVC) kicks in just change the setting in Mission Planner.

This is how its done: (using a Devo 7)

Open Mission Planner (assuming your have already downloaded and installed it) Download link http://ardupilot.com/downloads/
Step 1:

Switch ON your Transmitter.
Connect your quad to the battery (make sure your props are removed)
Once the ESC initialization is done, connect your quad to the Computer with the supplied USB cable.
Once the connected to MP, the left LED on the Quad will blink and give out a "beep"
Then on the extreme right top corner of your Mission Planner screen, you can see the port connections, select your port, if you not sure which port you on, go to Device manager and click on Ports, and from the drop down menu you will see something like "Arduino Mega 2560 (port number) this is your port number. Once you've selected your port, change the port number to 57600 and click connect.
Once the connection is established, the red connection button will turn green.


Now, moving to step 2:
Once you are connected, the first thing that you'll notice is the flight data page, where you have the map on the right side and the level of your quad and all other variables.
This screen will show your Quad as "DISARMED" and Bad GPS or Compass fail
Don't worry, you are probably inside the house and GPS is certainly not attainable here.
Next select "initial setup"  in the initial setup, go directly to Mandatory Hardware and setup your quad frame type, accel, compass, transmitter (before moving on to the flight modes, setup your transmitter as flight modes option works well when your "switches" are calibrated.
Next you can go to flight modes and flip your switches on the transmitter and see the corresponding channel turning green. Here you can choose whatever mode you want.
Mine is set at 1, stabilize, 4, alt hold 6, RTL. as I have a 3 point switch on my Tx. Once your modes are saved, you can click on "save modes"
Next step is the Fail-safe, go directly to battery, and on the Low battery drop down option bring it down to 10.5 and select RTL. (now your quad wont fall or land at unknown places)

Lastly, before going to the Config/Tuning option, I strongly recommend you to make a backup of your parameters. To do this, go to "full parameter list" and only press the save button and save it as Original qrx350 settings or something of your choice and save that file. It will be saved as a *.param file.

If anyone needs the original qrx350 parameters file just send me a pm as I don't know if I can attach it here.

For people having problems with the tilt control on your devo 7:
1. Hook up your camera and gimbal to the quad.
2. On your transmitter, press enter and go to "model" in the model sub menus:
GEAR >  select "mix" > "DN' select "ACT" > "DN" again for FLAP, select "AUX2" then "DN" again and select "ACT" then DN > AUX 2 > select GEAR > DN > ACT.
Now try turning your knob, your camera should tilt.
Alternatively, you can increase the tilt angle by increasing or decreasing the "V1" knob on the Gimbal controller.

Hope this post is of any help to anyone searching for issues like these..