In the lead-up to the 2010 Vancouver Olympics, Zach Caldwell led a much-discussed, multi-year effort to pin down the best stonegrinds and waxes for the challenging, variable conditions at Whistler Olympic Park. Caldwell’s months and months of hard work even drew the attention of National Public Radio, which Kris Freeman’s horrific skis in the opening 15 k freestyle in Vancouver. When the best skiers and wax techs in the world can be baffled by conditions,...