coolness! I only have one suggestion. The Athearn Sunshades suck. for a few dollars, you can by a set of 6 of them in brass from A-line, and adjust them for the right angle ( instead of sticking straight out).
these look a billion times better than those plastic ones. All you need is a pinvise, and a drill set that has atleast a #80 (which is the size of grab irons) and up, as well as some pliers, and the correct paint. I installed them on my GP-7, and i'm planning on putting them on some of my other locomotives as well.
Also, i think some of the parts are attached wrong ( looks like the CNW units were previously owned, lol.) might want to remove the head lights and sandfiller hatch, then re-install them from the inside like they are supposed to be. lol, it reminds me of my first kit, it was an AMD103, and i did the same thing!