Nils Koppen has gotten used to many of Rangers’ transfer pursuits being out in the open. Only the Belgian recruitment guru has struggled to get enough of them over the line. As Rangers look to unearth priceless gems from across the globe, panning for gold in untapped markets has led to a lack of control over information. Already this window Rangers have lost out of on the likes of Jose Cordoba, who chose Norwich over Ibrox, and Nathaniel Adjei, who moved to Lorient. Then there’s Damian Garcia of Uruguayan club Peñarol and, if fresh reports are to be believed, a Bayern Munich youngster who sees…