Thanks for the videos, Zleek, but I'm going to pass on this achievement. These platinum times are completely unreasonable. Even the top leaderboard times on most of the tracks are only two or three seconds lower than the time.
I can do the tracks flawlessly, I know all the obstacles, I go through them as fast as I can, and end up seconds off. I replay the tracks for hours and hours without ever being able to make up those few seconds. I watch leaderboard replays and they look just the same as what I'm doing but somehow they're faster.
As much as I'd like to get this achievement and retain this completion, it's clear that Redlynx only wanted the experts to complete this.