Well actually with experience i did realized that yes, you would be able to do it, for simple reason, the corners are never changing
If you pay attention, youll be able to notice where i start to use the gravity jump, if you start it at the exact same place... it will work
So its just a matter of corner knowledge, the hardest would be corner in shiftline, those are hard, but same as other, can be "referenced" and gravity jump from the same exact point on screen
If you never made any corner, yes it will be impossible for you, but with some corner knowledge... can do a lot of them, actually i would easy bet i can make half from memory directly