You didn't need a wide board. The Legacy is just a wider SL. For just cruising and flat tricks you would've been better off with an Evo out of the NS lineup, but the Legacy will still work. You've already bought it now. Quit worrying about it and ride it.
But wait, if you haven't ridden it, I'd return it. You definitely don't need a wide.
"People say that marijuana smoking is going to get in the way of my career. I say to them that on the contrary, my fighting career is getting in the way of my marijuana smoking." -Nick Diaz