Last month I played my Les Paul for about an hour, and my shoulder was fooked for almost two full weeks. First time that's ever happened. After the pain went away, I played my strat copy exclusively for the next couple of weeks. No problem. All better. So last night I picked up the Les Paul again for about a half hour. One day later and it's the same as last time. I'll be taking painkillers before I go to bed tonight and calling a doctor tomorrow. But I can see where this is going. That's the thing about aging. It never stops and it only gets worse. Heheheh.