this is for those 1s enthusiasts mostly.

Kingkong 76mm props have 2 main problems
A. they have 1mm shafts. don't try to drill it out to 1.5mm. you'll cry trying.
B. the mounting holes are not through which make props sitting on top of the shafts and easily bend in crashes.

i've just figured out a solution.
i use a countersink bit ( bought from CNCmadness. it's for making countersunk holes for frame. it's very sharp. you can use it by hand )
to drill on the top of the hub until it meets the hole. now props can sit right on top of the motors. and that would make it hard to bend shafts in crashes, even when they're just 1mm shafts. and i use superglue to hold props. it works out pretty well for me so far.

0.3g/each prop, that is very light, the lightest 3in props which make some powerful 1s setup.

weight: 27gram dry
frame: 3in frame designed by Alexandre Arvinte
runcam nano 3
happymodel crazybee X 1s/2s 5a esc whoop board with built-in RX/VTX
custom canopy ( link below )
kingkong 76mm props
GepRC gr1102 14000kv motors
batteries: 450-600mah
And use TX30, i think it's better.

PID is ok, not good.
camera angle: 30-35 degree
betaflight 4.2.2
R: 86, 83, 61 ff: 100
P: 90, 85, 83 ff: 100
Y: 71, 76 ff: 100
I term rotation: on
TPA: 0.45 breakpoint: 1500
thrust_linear = 50