Tarot 680 Pro Hexacopter Build Part 1

First piece showed up in the mail today. I picked up a few items to assist along the way as well.

[cwiku]

wow. now that looks like awesome quality.

[HoverbotTV]

Nice look forward to the build. On the alloy tube clamps soften champher the inner edge where the two parts meet. Otherwise they can cut into tube. I leaned the hard way.

[giorgosarab]

Nice project man! I really like that frame. I lost my qouad i don't know if you know it i thought that i would find it but no, i didn't. I can't wait to see your beast in the air. Sorry for the spam

[jake]

Could you please give your parts list? Looking foward to the build, can't wait, Eh!

[spencerboaz]

At least they give you instructions DJI don't . You have to get everything for a F550 offline .

[MrNams]

I tried auto tuning, but it crashed, then I tried manuall tunning, its still not became stable and crashed.

Can anyone help me how to make my build stable and less sensitive.

Now when I just touch throttle it rapidly goes up-down. I tried modifying sensitivity, radio transmitter curve etc nothing helped.

I want my hexacopter to less sensitive to radio input, smooth roll, pitch and yaw.

What should I achieve that??
Flight Controller: PIXHAWK PX4 2.4.7
Firmware version Copter 4.0.5
Transmitter: "FrSky Taranis Q X7 ACCESS 2.4GHz 24CH Mode2 Transmitter with R9M 2019"
ESC: Hobbywing XRotor 40A-OPTO ESC
Motors: Tarot 4108 High Power Brushless Motor (380kv)
Battery:6S.
Frame:Tarot 680Pro