Sadly, I'll admit that even I have forgotten some of the minute details of how to solve this puzzle, but I added a few white panels to the very top floor near the orange excursion funnel to backtrack if necessary.

Added light strip to topmost button alcove.

Added many more emancipation grills and glass walls to prevent major sequence breaking, as pointed out by Gooseflight. Moved exit door activation button further away, behind panels, and longer timer. Removed white panels in places they were not essential to the puzzle.

1. Added more glass panels and metal grates, in an attempt to prevent breaking sequence.
2. Adjusted signage.
3. Minor movements and restructuring of nonessential elements.
4. Other minor changes.