My first question, How do you rotate fusaloge pieces 45 degrees? It looks really nice on a lot of stealth planes. Second question, Is there any possible way to make a jet without making the front piece weigh 5 tons? Because I cannot and all the default planes have noses with normal weight.
Fuselages can't be rotated to 45º without XML editing. I'm no expert on it, ask someone else for more details.
Most jets have both COMs and COLs close to the rear.