Not so I have seen starters not work just click and not turm the engine over. What people don't realize is the manufactures use the smallest wire they can get by with. Over time they can build up a resistance and not work any more. As well the contacts in the solenoid can oxidize and cause the same porblem. I have use solenoids for a inertia drive starter wired in and make it work this way. Just did my first one with the relay and it works as well.Where did you add the relay- show photos and a diagram. Is it activated by the crank wire and bypassing that wire, with tab 87 connected to the battery and tab 30 connected to the solenoid?
Adding a relay strikes me as similar to adding a fuel filter when the original one becomes clogged.
Has anyone ever lubricated the Bendix on the starter?