I have no interest in medicine - I just thought it made a cool online alias.

Yes, Ricks do have double truss rods. I am not an expert when it comes to guitar/bass construction and maintenance, but I suppose mistreatment or abuse can cause any neck to warp. That's why I usually trust my setup work to a pro.

I haven't seen the "See Emily Play" video clip, but apparently Roger also used it to play cricket with in the video. That couldn't have been good for it.