Hi there! Some small converns about hitsound volume/usage below:
on Collab Insane: 02:31:745 (3) - wasn't this supposed to have higher volume than the rest? When listening to the song at 100% you can barely hear anything there and it's almost inaudible and inconsistent with the rest, specially when they have 100% volume. It seems like it was caused due to top diff muting this slider as it was a sliderend, not a clickable object.
01:44:012 (6) - forgot a clap on sliderend? 01:44:279 (7) - and this one should probably be a whistle instead.
on Collab Hard: 01:44:145 (4,5) - you didn't hitsound those beats, even though they are hitsounded in other difficulties.
02:55:479 (2,3) - aren't these a bit too far from each other? Ctrl + G on (3) would definitely be a more expected movement and a lot more readable to Hard players.
03:14:945 (2) - probably another missing whistle since drums didn't change there.