Decided to try to design a new ducts to Kopis Cinewhoop.
Kopis frame is very good platform to my purpose, since it is quite low prized, frame is really rigid but original ducts are crap :P
I designed a hollow double duct to replace the original hard plastic ducts. I am aiming to have more durability and softer crashes.
Bigger ducts means, that i had to redesign the cam cage plates to bring the camera forward. I also remixed the GoPro mount to come more forward.
I designed a simple antenna mount to Caddx Vista (Rush) antenna to rear. Also some landing pads.
One duct weights about 60g. It sounds a lot but if you take e.g. Taycan: Two ducts weight alone 15g each, then foam, 6 standoffs, top and bottom sandwich plates -> goes very close to this. I weighted my Bumblebee build to same weight with this design, about 350g without gopro and lipo.

All printable parts are here: https://www.thingiverse.com/thing:4235898

I use some old Gemfan Hulkie 5055 props now and they work very well trimmed close to duct.

SETTINGS:
I have the Betaflight version 4.1.5 and latest blheli32 flashed
Motor timing is set to Auto and pwm frequency is 48hHz in blheli32.
I run Dshot600 with 8k/8k, because i use the F7 fc.
Rpm filters are on.

I copied my settings (shown in the pics) from cinewhoopers Facebook page. My bird flies like a dream with these! Super smooth!
Removed the previous settings from this text, because these new are WAY better! :)