My Take on the Kayouloin 7" by Kayou Frames..

Analog setup, naked weight is 660g, it flies so good.

We designed this frame especially for Mountain Surfing and agressive flight style, Squished X geometry gives it much more stability than any deadcat I've flown before and keeps the props out of the fov above 25deg tilt with a gopro superview.

8mm arms also gives it crazy stiffness, this thing just doesn't oscillate, filtering and tuning is super easy, especially on BF4.3 with UavTech 7" presets.

NoStab Footage (props are in the fov because I was flying with the DJI Action 2 with a massive Fov, you'll find more footage on Kayou Frames website) :

Flight time with a few packs I had the opportunity to try :

Lipo 6s 1300mAh : 3-4min
Lipo 6s 2200mAh : 4-6min
Lipo 6s 3300mAh : 6-10min
Lipo 6s 4000mAh : 8-12min (You'll start to feel the weight here even if it's a 7", I'd rather fly 3300mAh for my agressive flight style)
Liion 6s1p 18650 3000mAh (VTC6) : 10-12min, don't fly with thoses, or fly really slowly because 30A is barely enough for a 7" quad, they do heat up.
Liion 6s1p 21700 4000mAh (Molicel P42A) : 12-18min, excellent, that's what I fly with everytime I wanna do some chill cruising and cover some range.
Liion 6s2p 21700 8000mAh : 18-25min, for science, you won't do agressive mountain surfing with 900g on your back but it works !