*
* @return
*/
public void addSingleSourcePosition(WorldInterface w, Vector pos) {
BlockEntity e = w.getBlockEntity(pos.getBlockX(), pos.getBlockY(), pos.getBlockZ());
if (e instanceof SignInterface) {
SignInterface s = (SignInterface) e;
if (store && s.getLine2().equalsIgnoreCase("[Black Hole]")) {
canStore = true;