The Marauder is pretty much made up of Round Cross Sections with Bulges added at various places. A few AF99 Structures gives a pretty good general idea of what the shape will be. I used a AF99 Utility I wrote to Mirror the Cowl to have an identical one for the other side. Before I had this Utility, Mirroring a Component was tedious and very error prone.
Keep in mind that this is just an examination of the shapes, Almost NOTHING in this screenshot will exist in the final product.