In today's version I took out the piston platforms at the end of the chamber and replaced them with a simple bridge.

Back when I made the first Reduction, I put a bridge at the end much like the one I've just put in here. However, a helpful test subject showed me that he could use air control to reach the bridge in a way I had not expected. That test subject later disappeared under mysterious and unrelated circumstances.

His maneuver ended up putting him askew from the flight path imparted by the faith plate. He could not land directly underneath that flight path with his method, so for part of this "Redux" revision I changed that bridge to a single block and experimented with ways to make landing on that block allow access to the cube. I eventually settled on the weighted button that triggered the piston platforms, but I was never quite satisfied with it.

The weighted button normally deactivates whatever it is linked to when weight on it is released. I had used a trick involving LASERS! in a hidden room to make its activation permanent, but this violated precepts about that button's behavior that had been fairly firmly established elsewhere. When a test subject saw it, they would (hopefully) conclude that the button would raise the platforms, but might reasonably believe that the platforms could descend again. So they would believe they would also need to find a way to keep the button weighted once activated, when in fact all they would need to do is reach it. This was a distraction I did not want test subjects to have, but it was the least bad of the methods I thought of that would disallow an unintended air control solution.

Shortly after publishing this Redux version of Reduction, I had a new idea that I thought might allow me to cut off the air control path, allowing me to replace the piston platforms and weighted button with just a bridge. Unfortunately, while testing it, not only did that idea prove ineffective, I even discovered a further air control trick which allowed me to land directly on the target block, which I had not thought possible.

So no matter what I do, I cannot eliminate a solution involving air control, so I just put the bridge back in anyway. There is a solution that does not involve air control, but if you use air control to solve this test chamber, good for you.