The Grohe smart design tutorial on Single - lever basin mixer installation in your bathroom is to follow just few simple steps as shown here - goo.gl/ouonhV
The brass thread is so long there are no sockets deep enough for them, it’s annoying. Please consider including two or three lengths of threaded rod considering some taps are hundred’s of dollars.
If you don't want the tap to come loose, don't use that flimsy horse shoe shaped clip that fits underneath the sink for the nut to screw up against, if the tap manufacturer can't come up with something more reliable to hold the tap to the sink don't use their tap.