I'm not certain, but I think you are wise to think twice about making that stronger. Did you talk to the dealer to see if it would be under warranty, I don't know about stuff like that. A good dealer should try and fight for you to get things covered, and I'd be a bit upset if something broke after only 5 hours use. If you were using it properly, it would be good feedback, I know my dealer said LS really listens to their dealers and takes a lot of their suggestions. I'd at least ask if this is a common breakage, if he thinks it is designed weakly etc...maybe he's seen results of other customers making that part stronger and breaking worse somewhere else, I don't know.
With most things I default to the manufacturer, especially if it's still under warranty. If you modify anything, it gives them an out if you ever go to break anything that could be related.
I generally also default to the manufacturer, because in most cases, things are designed a certain way for a reason. Sometimes you can argue cost savings and them trying to skimp by, and in some cases, maybe this one, you have an argument, but back to the money idea, manufacturers also don't want to always be paying out for warranty work so it is in their best interest to design things at least past the point where it will break after warranty.
