Mr_Nickle's Shoot-to-Bash Script (Fixed)

This script makes it so that if you press Mouse3 (Pressing scroller down) it makes your Left Mouse button bash and your Shift shoot. Press it again its back to normal.
I'm Mr_Nickle, this is my third script I've released so far. Like always, I love feedback about my scripts, so if you could please give me some that'd be great. *Fixed* Version. Original had an error in it. If you have the original, you mide as well