Don't sweat the flaps. The Mad Dog flaps are more plain flaps than anything else. They mostly just come down, but they do move out a bit. Yours look to be as close as you can get in scale. You have your flaps/slats in what looks like the landing configuration.
Fly-n-hi is correct about the slats. The wing is sealed/air foiled behind the slats.
Also don't worry about the tail graphics. Alliegiant MD's have a wide variety on the tail sunburst.
Taxing out today in "Vegas I saw a good part of the fleet. Your tail matches well with many I saw.
http://i.imgur.com/xCBk4l.jpg
I took this as one was getting ready to take off.
Over all a very nice job, What kit/scale is it?