Heavy Drills 2006 3,356 h United States, Lake Worth, Texas
Heavy Drills 2008 8,461 h United States, Lake Worth, Texas
Heavy Drills 2004 United States, Lake Worth, Texas
Heavy Drills 2011 878 h United States, Longmont, Colorado
Heavy Drills Germany, Meppen7d
Heavy Drills 2006 7,988 h Netherlands, ZEVENBERGEN