It would be nice if the message reappeared every time you neared the gears until you successfully turn them at least once. I managed to get to the gem
without doing so, and I was pretty annoyed I'd been thrust into the master's course right when a mechanic (leaping out of water) was introduced, then doubly annoyed that I wasn't supposed to do that at all!
The trick was to take the swimsuit, jump as high as you can to the left wall, leap to the medium gear; leap to the slow gear, then leap into the passage leading up and leapfrog up to the platform. Then it gets difficult; to the right there's that hole and a shear wall far too high to leap over and nothing nearby. So what do you do? Make your own springboard, of course - throw a charged seed in the plant suit at the wall, then jump onto the vine. The position is really important because your angle depends upon where you are on the springboard, you can't correct that angle, the angle varies hugely, and when you leap off the springboard you're fired at great velocity. So it takes a few times and you'll likely find yourself down one or the other hole multiple times. Once you hit the ceiling near the path across, quickly leap into the hallway and then it's just another leap to get to the gem. That you can't move. So you just wasted ten minutes.
