Building the World's Lightest Brushless Whoop

How light can a brushless whoop be, and what would it take to build one? Let's find out! Build details, links, and PID tune below...

Parts:
BetaFPV F4 1S AIO FC v2: http://bit.ly/2m2JX9e
BWHOOP65 Frame: https://amzn.to/33EapH2
RacerStar 0603 16,000KV motor: http://bit.ly/2VPraMD
Better motors you might want instead: http://bit.ly/2VMKJVX
Gemfan 31mm 4-blade Props: http://bit.ly/2nSvjmt
The camera/vtx I actually used (not really recommended): http://bit.ly/2nTWvBl
The newer camera I mentioned (might be better?): http://bit.ly/35H4KSg
RENY M1.4 4mm screws: http://bit.ly/2P0JOzT
FrSky antennas (for making custom monopole fpv antennas): https://amzn.to/2qlAf47
The real PH2 connector (90-degree version): http://bit.ly/2Jcu4Gj

Betaflight 3.5.7 PIDs (work-in-progress):
set p_pitch = 50
set i_pitch = 55
set d_pitch = 45
set f_pitch = 440
set p_roll = 40
set i_roll = 45
set d_roll = 40
set f_roll = 390
set p_yaw = 70
set i_yaw = 90
set d_yaw = 0
set f_yaw = 100

Full CLI Dump:
https://drive.google.com/open?id=1Tzm...