I think Edward should have used the phrase "the greater the effect" rather than "the greater the apparent effect." Maybe "the more apparent the effect is". Edwards comment makes it sound as if the effect is an optical illusion and not really happening.

I went to Ace Hardware and asked the manager if he had a pipe and some magnets. He so hesitantly obliged he must have thought I was going to use it as a weapon : )

I don't know if the pipe was thick walled as called for. I said "thick walled" but it didn't look that thick to me. The magnets were ceramic not NIB so not as strong.

The effect was there but not nearly as "apparent" as the video depiction. Sadly the manager wasn't impressed and thought I was crazy. I guess he couldn't see it. He was pretty old : )