I can see the smile on your face from here.
It looks like a 2551 with a slide to me.
I went to the factory twice, once before they started mine and again at about the same stage yours is in. I found a couple of things I had changed during the second visit. I hope you are getting the full paint, as I did. I can not pull into a campground that someone tells me how great looking my motorhome is. I even have people in parking lots, gas stations and even at stop lights commenting that they like the looks.
Have a great time with it.