i read your numerous answers and I wish to thank of all you for your great and such kind answers.
i will try furutech gold and rhodium model. Gold was advice by my cable provider. His plugs are in gold too...
in parallel I strongly advice you to use some oil on the connectors such as Drop oil from Charlin, à french provider. This oil is usable on power cable and modulation cable. LS too. Never on rj45 cable. As you know the aeronautic industry is using such a kind oil in their cable connections. Thanks again for all your answers,
all the best in music !
JM