Since the website won't allow multiple images in a single post, you'll have to bear with me as I work throught the installation.
The first pic is the unit as recieved and the hardware. Everything you see comes in the kit with the exception of the stainless lock washers which I supplied (I'll explain that in a moment). It would have been nice if instructions were included. The instructions are on the internet, but for folks that don't have a printer or didn't print them out before leaving work, having a copy of the instructions would be a nice touch.
The instructions have two options for attachment. One is using the longer allen head screws along with washers & nuts. The other option is to drill & tap the nozzle housing to accept the shorter allen head screws. Since I decided to go the screw & nut route, I wanted to make sure the nuts wouldn't back off from vibration; hence, the inclusion of the lock washers. Personally, if I were putting this hardware kit together, I would've included nylock nuts (like what you see used on your ride plate).
One last comment about the two installation options and this is coming from a manufacturing engineer who is used to building aircraft and has a very good understanding of positional tolerancing. Whereas I'm sure one could use the unit as a locating template, being able to drill the nozzle and tap it with any degree of accuracy is a tall order. This is mostly due to the holes having to be located radially on a curved surface and the holes in the steering unit are the same diameter as the screws. The net result is an installation that we refer to as close tolerance. To do this at at Gulfstream, I'd order a designed drill tool that would have locating pins and drill bushings. That drill tool would be mastered from the same tool the put the holes in the steering unit. Anyhow, it's just my professional opinion.