Hello Neil
I just found the website that you are taking about.
I saw Alan Curtis models advertisement in old N scale railroading magazines.
Like Webbo said, it wasn't cheap with everything you need.(I remember he recommended MT Trucks for them.)
So I couldn't purchase them.
And as usual, I don't have any useful experience
but I've seen and heard that it was a great kits.
Probably you wouldn't regret getting one.
Also I used seen "N scale of Nevada".
But they discontinued.
We should have more (cheaper) freight car kits!!
So I can enjoy building them.
Anyway, I'm looking forward to seeing your AC models adventure!!
Dats