Ya, I've learned for complicated models, try to make every tab perfect, get the numbers to be parallel to one another for it to be correct. One tab can make one side of the helmet be tugging one direction which tosses off the entire balance of the shape. Put the visor in, it might fix it. I've had this problem on my old halo 2 helmet, the brim was crooked, but after placing the visor in, and resining, it came out perfect.
