I would shoot it first before making any slide tightening moves. My two Colt's are loosy goosy from the factory, and I like them that way. I concentrated on barrel/bushing and lock up improvements. These two Colt's shoot really well. You will get a lot of opinions on whether you need to tighten your slide.
Don't want to flame the Taurus team, but, I would look elsewhere....?
Not trying to sway you either way, but, I've seen ultra tight race guns fail in matches after they get gummed up. If the rattle bothers you, well, that's another story, but, IMHO you don't gain that much in the accuracy department by reducing slide to rail tolerances.
Shoot it first dude, then make your decision on what you really need to do to the pistol.