Hi folks, I bought an older Vanguard and ripped it all apart for the purpose of replacing the starter and checking everything else out. The good news is that I got a lot of good info here about what to use to fix cracks on the top edge of the "bottom half" of the plastic "frame." It was of course West Systems, and I used 655 G flex and some silica. So this puppy is just about to finish going back together and putting the top half on. The bad news is that i forgot how the seat back goes back together. I have a new piece of plywood and I can see where to drill 3 holes to use threaded inserts. I can see that I go BEHIND the plastic frame and send in three screws that will contact the new plywood. That's great, but what holds the seat back "up" besides the plastic just behind the seat back? Certainly there is some support bracket that I am overlooking. I am at a loss. ANY pics you could send would be great. Finally, I love this site, because it is filled with tons of useful information that I am grateful for. Thanks, Rockyman