I was in the same boat as you - new G35, gear and reloader. And as always, I've spent more than expected.
The sight installation is not difficult. There is a video by Dawson Precision on Youtube that I watched before I installed my after market sights and the installation went fairly easy. All you need is a copper punch and a 3/16" hex wrench.
I forgot about the file - you'll need a file to fit the rear sights.