i always check that fasteners are tight on any assembly we buy - new or used.
The cartridge usually has anticorrosion on it not really grease, so you want to jam some goodly GP grease into the cartridge. Also make sure on the crank the old shyte grease is chased out, then fill it with goodly stuff.
The balls should have a light lube film on then, same with the movable cheek where it touches the center shaft.
The correct pliers are handy to have, or get some forceps and rework the tips to fit the tiny ends of the truarcs. You will need the tool to remove the variator. To install lube the crank shaft with some gp grease and slide in on until you hear the click on the internal truarc grabbing on the groove in the crank shaft.