I saw the other post about this that you posted and since then I've been hemming and hawing to myself over which level to get. I knew I wanted the original with the copper tube and stand, but was thinking about settling on the anodized black set. Then again the copper set would be super cool. There are 7 days left for me to figure out which if any I spring for.
Of course my first thought when I saw it was, "I could so use this in school to demonstrate the physics properties and then tie that in to some math that we're doing." So basically, I wanted it as soon as I saw it and immediately tried justifying it to myself