So... I was playing around with different versions of LADX, and did this: (go to 31:00)

Enother vid, managed to make it consistent.

Just tested on 3DS and it works the same as expected

The Super Jumps are shorter than usual though?

Yeah shorter so some Sj's in 1.0 aren't doable with it. Also the newest jump to get back over the key block in d1 doesnt work in 1.2 either