I'm not sure, if that article is even worthy to enter JCSref. I mean it's an old piece of junk I wrote when I was still a newbie. It's basically what Wakeman showed me in a level of his back in 2000 (I think) and I summed it up. Flying springs definitely need a closer look and documentation, its just I never really bothered to explore them in detail. The facts that I do remember are four.

1) You have to place the spring on a tile that has the upper line masked.
2) You have to drop a monitor on the spring for it to start flying.
3) You have to approach the spring from above.
4) The spring will always fly diagonally to the upper left direction.