CM2250, fuel leak mystery, please help!!

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I did a full set of onjectors at the end of last year and installed new fuel connector tubes with them. A week later customer said he had a fuel leak at number 2 so i go to check it out at his place thinking the o ring on the tube was cut when installing it. It was fine so i closer look at the supply tube from the rail and i saw fretting right on the beveled tip where it seals to the connector. Replaced the connector and supply tube fixed it. The torque on the originals was low and didnt seal properly on a new connector causing the leak. Might be your issue too. Signature620 mentioned that as well.