Sd9 owners out there. Has anyone bought one of these in the last year? I bought the one that was released for Academy sports to sell. It’s a sweet gun. I put a light on it and love it. My question is, is this gun any different than the one that was released back in 2010-12 era? I have read where that one was discontinued but then this one is out now. Is there a difference other than manufacturing dates? Last question, is it safe to install a ss guide rod with factory spring?