Nathan,
Actually, there is quite a bit of detail at the wing roots, but you're correct, the rest of the wings are smooth. Also, you're probably correct about the front wing root parts being variant changes, I never thought of that,. I can understand why they would do that now. They are just slightly frustrating to get aligned properly.
I find it interesting that the cowling is made up of 4 different sections. The 2 sides and the top and bottom. Thankfully, the parts align along where the actual cowling was attached so there is not a noticeable seam.
Lawdog, thank you. The Mig 3 is also my favorite Russian fighter of WW2.