Tim,the big issue with DIYs, is what does the future hold for such craft.
It would not be inconceivable that at some point the FAA requires them to be inspected for air worthiness. Not even sure that is not a bad idea.
Currently you can still register them but with the FAA who knows what future regulations hold in store
I had a business, government contracting. Harris Corp was one of my projects. It was for Afghanistan assisting our Brother's from IED's, cant get any more specific than that. I had contacts with our Congressman and Senator. It was fun but you have to play their game.wow if you handle the politics of it all, then the rest is a piece of cake.