Something just occured to me and now its driving me nuts. My 57 3100 has always had a plywood bed in it since I bought it in 1989. I replaced it about ten years ago with a new piece of CCA 3/4 inch plywood because I have never had the $ to put in the bed kit. So here is my question. If the plywood doesn't bolt up to the angle strips on each side (and they don't), what holds the bed to the frame? In other words, does the bed hold the bedsides on the frame? I would think that my bed would have fallen off by now if the angle strips had to be connected. I have looked in the assembly manual but I cant find a clear picture of this. So of course, here I am cause I know that one of you will know the anwer. I need to do something about my bed wood again and I want to be safe. Thank you.