Can go lower, but I'm done with this IL for now.

At the end, instead of jumpdashing to the last defense system, you can perform another spindash while holding right to force Shadow's (relative) Y gravity to push upwards.

Some techniques not obvious:

1. You can see the above mentioned technique pulled off right before that section successfully. In that room holding the control stick right while in spindash or sliding state will apply Y gravity force upward.

2. At the beginning, at the first Shadow/Special Weapons Box, after pushing the gravity switch I go into a spindash. When releasing the spindash I hold Right on the control stick as the gravity mode makes (relative) negativeY gravity while holding right. This allows us to reach/exceed shadow's top running speed without a full spindash charge. My execution was slower than I would have liked, and you can see sub 0:35 times hitting the dash ramp if optimally pulled off.