Not wanting to sound (too) controversial, but I don't think that's all that impressive as a 6 year old block. I think in fact it was more that all the other blocks around at the time were rather unimpressive. It's all basic thermodynamics, and fluid dynamics. The problem was that the people finding solutions weren't/aren't scientists with a background in what they were trying to produce. I'm as guilty as the rest - I was using a whirlpool block for years
