I've changed oodles of brakes hoses in my life but this is a brand new Borg & Beck hose leaking. I have fitted it in the reverse of the old one with a copper washer each side of the banjo type fitting at the caliper......and it drips brake fluid and for the life of me I can't see why. I've been careful not to over tighten, and it all looks the same as the one that came off which didn't leak, but was a bit perished.   Is there a trick to these banjo fittings that I'm missing. I mean