SEVERAL YEARS AGO OFTEC WERE INSISTING ON FLARED FITTINGS ON OIL LINES, BUT THEY WERE VERY DIFFICULT TO BUY. nOW THEY SEEM TO BE SAYING FLARED TYPE B, OR COMPRESSION AND OLIVE TYPE A? SO WHICH SHOULD I USE? I HAVE JUST FITTED FLARED FITTINGS, BUT DESPITE TAKING ALL DAY TO DO THE 11 OR SO JOINTS, THEY ARE NEARLY ALL WEEPING- WHEREAS THE COMPRESSION JOINTS THAT I PUT IN 10 YEARS AGO HAVE LASTED ALL THAT TIME AND VERE LEAKED. ANY SUGGESTIONS?