I don't like lock washers for the same reasons you are having problems with.
Go to Advance Auto or other auto parts store and purchase a Locktight product (In a tube) that you put on the threads. It locks the bolt to the nut.
Blue tube you can take apart later and RED tube may lock it so tight you may never get it apart again.
I use the Blue and purchase the jell type that is in a lipstick type tube. I always want the option of being able to take it apart later.
Thanks for all the great tips. I suspect that the sagging is caused by the design flaws. Then the sagging caused the lock not to function, one owner cut away the metal part to address it, then another owner then added the two screws to compensate for that. All the while, the door didnt even shut properly so the only way to do that was repeated slamming (which i am guilty of
) I suspect that is the cause of the fiberglass cracking. My dillema is i like things done properly, but after reading that great article of re-doing the door i know that is way beyond what i can do, or afford to pay someone else to do. So, the goal is to go for the best band aid available. I'm going to look for one of those bergman locks, get the metal replaced in the meantime, and "fix?" the door sag with lock tight (great idea,
I think i even have some) If that all holds up i can fill in the fiberglass cracks later. I was looking at the scamp
door hinge replacements. Those may be worth a look as well. I havent yet compared to see if they are the same hardware. Thanks again.