Tree Upgrade time changes

src/engine/objects/Blueprint.java

@@ -497,7 +497,17 @@ public class Blueprint {
         // Select equation for rank time based upon the
         // buildings current Maintenance BuildingGroup.  These values
         // are expressed in hours
-
+        if(this.getBuildingGroup().equals(BuildingGroup.TOL))
+            switch(targetRank){
+                case 2:
+                case 3:
+                case 4:
+                case 5:
+                    return 6;
+                case 6:
+                case 7:
+                    return 36;
+            }
 
         return 5;
     }