It's way more nervewracking than I thought it would be.
Originally I envisioned it as a fairly simple puzzle with a nice trick to make it more difficult to figure out... and some misdirection to make the setup less obvious. The result, however... you have to see it to believe it. And it doesn't even look that hard at first... but once you try... you find out.
Not that I couldn't ease it up... I chose not to.

The teleporter puzzle is a breather -- it's puzzling, but at least you can't really mess it up.

Conveyor button 1 is under the box near the blue timer. Conveyor timer 1 is in plain sight.

EDIT: If you want to play a more challenging version of this level, one that forces my original solution plus adds a small timing difficulty to the mix, download the "A" version. It has a barrel near the red gate.