While searching for the source of my intermittent top operation, I discovered why my roof latch moves as free as it does; only one screw is holding it in place. I will now have the pleasure of working with 'nutserts'. I found a lower cost tool to attempt this fix. It cost me $30 for the tool, package of 12 inserts and assorted sales tax. Here is the link:
Surebonder Threaded Insert Tool
MNBoxster - does it look like I have the right tool and inserts? I don't know if I'll be able to make $5 making the repair as you did.