This is a model I did for my 3d modeling class last spring. I got an A in the class and an AAS Degree. ;-)
A few things I learned...
Never convert angled surfaces to solids, especially if you plan to connect those solids to other solids.
Angles don't always look good in 3d as the might on paper.
Never play around in class with things you don't want to have to make a project of.
Now to remember the other fighter types I had for this same world.