New sending unit leaks at lock ring

Very common on repo lock rings. There was a guy on here selling some original lock rings....you could go original. What I did was take the lock ring off and bend the tabs in a way that made the ring fit tighter. Is the original lock ring still around?, use it. Two gaskets don't work as it makes it to tight to turn the lock ring.
That's my experience with this fun and enjoyable job of gas tank R&R, someone else may and will likely have some other idea :)