I work as a mechanic and i was using a wheel bearing slide hammer type tool with a weight on the end of it . It required forcibly pulling on the weight many many times to free the offending bearing. I blame this for triggering the RA. My brother had very severe RA for 35 years and passed away last year at age 58. I am 52 and worried that i will suffer for the rest of my natural life.Am i wrong for berating myself in such fashion or would it have occured anyhow? What's your opinion?