By Matt Hladik Minnesota Timberwolves star Karl-Anthony Towns may consider himself the greatest shooting big man of all-time, but Kevin Durant disagrees. During a recent episode of “The ETCs with KD” for Boardroom, Durant discussed his appreciation of Dirk Nowitzki and how he tried to emulate parts of the legendary German’s overall game and practice routine. Durant concluded the clip saying definitively that Nowitzki is the best big man shooter in NBA history. “[Dirk’s the] greatest big man shooter of all-time, although I respect KAT [Karl-Anthony Towns],” Durant said. “But it’s Dirk Nowitzki….