Just got thru reading the review of the Lotto Machine Speeds, good stuff as usual. (Love the mention of the ATP journeymen wearing Lottos - makes me realize Lottos are probably built to a better standard for real people who can't afford to buy, or aren't handed, a new pair of Nike's every week.) Question: The extra cushioning mentioned in the Machine review there caught my eye -- are the Challenge's similarly constructed? In the descriptions, you guys say the "ENERTURN cushioning system (runs) along (the) entire shoe." Does that cushioning run along the entire Challenge as well? (Description only mentions that it's in there somewhere.) Thanks!