That's looking pretty awesome... I was going to say as you build them, you should make sure their sealed... and now you have to tanks for OBA.. My uncle built front and rear bumpers for his old Nissan pickup, that were sealed and he used his as air tanks... He didn't have a compressor and such on the vehicle, he just filled the tanks up @ a gas station.. but figure shouldn't be too much harder to run lines and such to do an OBA air setup.. One day I'd love to take on this project.. but got much learning to do before I even attempt that..