How tough is BMW’s GS Trophy, the one-make, one-model competition that pits skilled amateur riders from across the globe against each other? We talk to team USA’s Scott Acheson, who competed in Namibia in the most recent competition. Here’s a spoiler: Namibian sand, Scott tells Neil Graham, is not like Floridian sand. Would Scott do it again? Absolutely. Would he prepare for it differently? Absolutely.