WE'VE BOUGHT A GAS BARBECUE FROM ARGOS & PUT IT TOGHETHER FOLLOWING THE INSTRUCTIONS BUT WHERE THE PIPES FROM THE BURNER ATTACHES TO THE GAS ORIFICE IT DOESN'T SEEM TO CONNECT VERY WELL AND THERE ARE VENT HOLES IN THE SIDE OF THE PIPES FROM THE BURNER, SURELY THE GAS WILL ESCAPE THROUGH THESE. W...