Good point. Take some serious lessons from the automotive industry and how they do impact attenuation. They've spent a LOT of money and man-hours solving many of the same problems you would otherwise have to figure out by yourself. That's kinda why I'm planning on designing the cockpit and cabin first when I do get to actually doing serious engineering work on my concept. Plus, that way I have a complete structure that I can weigh and figure out just how much wing I need to build.