update 11/16/20: i just realized that 56mm props are longer than 2in props. they're about 2.2in. that means 2in frame, 85mm, won't fit. you would need at least 90mm-100mm frame which is about the size of 2.5in frame.

i have an idea. build this and invite a few friends. standing around use yourself as gates and go racing around with it. what do you think ?

i wouldn't want to use 1s 300/350mah, 8grams, for this build. 1s 450mah are available to buy.
But my best batteries are the old batteries i got. 3s 350mah Newbeedrone, separated into 1s batts, 10grams/each,.

it flies really nice. i like it.

weight: 17grams + 10grams batt = 27grams AUW.
propellers: ldarc/kingkong 56mm props ( the remake ones, not the old ones )
motors: happymodel 0802 19000kv
board: happymodel crazybee lite 1s 5a with built-in RX and VTX
camera: runcam nano 3 ( 1.2grams )
frame: some old frame i got long ago. ( 2grams, 1.5mm ). i think you can use the frame from Alexander Arvinte's 2in frame.
I just remember where i got the frame. it's happymodel trainer90 hahaha.

build construction:
in the pictures i show how to tape the board onto the frame.
2 layers of foams, wall-mount foam tapes and the usual foam tapes.
wall-mount foam tape is stiff to keep the board from touching the frame.
the usual foam tape is soft to soft-mount the board.
Electrical tape to hold camera, camera-mount, and the board in place.
rubber bands to hold the batteries and the board in place.

PID:
i'm not good at tuning. this PID is ok, not good.
follow the instruction from here, using " toothpick " setup.
https://theuavtech.com/presets/
Then use the PID in the picture.
set thrust_linear = 0

watch out! a new racing pilot in the making. hahaha
nah, i'm just learning to fly. i'm having fun though.
https://www.youtube.com/watch?v=165mIk8WOnQ&feature=youtu.be