i am having the exact problem with my rex right now. seems like it is hit or miss with the starts. sometimes it wont click at all, and sometimes it will start right away. i was thinkin main relay. i replaced the battery and checked the starter and ground already. i will prob take the ground off and sand a little bit like everyone says. i feel u though with being sick of all this bullshit. seems like 1 problem after another with the rex.