Those are cool but one problem,not really a mfgr that makes them,most of them are made on the side by someone and they cost,over $2000.00.and this is another reason why iwant to seethese cox gas cars come back,its a cheaper way of running tether line cars and not breaking the bank to do it.i understand that these cox cars will not go 200mph but thery will haul the mail and be fun to play with.