I'm bringing this back from the dead. Although it's a good idea and very easy to do, eventually the spring stop will snap. I did this when the original thread was started. It's been fine all this time. Unknowingly, it was causing way too much stress on the spring stop. The strenghth of the spring is more than I imagined. I have a 2001, so the spring stop is in the 6 o'clock position instead of the 3 o'clock position shown. Ford just pressed out a tab on the metal to make a stop. This is not a design flaw. It's directly related to the mod. For now, I have a thick piece of wire rigged up so the seat lock is operable. Without it, the seat back swings freely. I'll find a better solution, but at least it works for now.