Weird, sudden AFR issue Proform 750cfm!

I had new gaskets. They are the thin metal washer type. It was still leaking from just snug, right up until the threads broke.
What is the secret to getting the squirters to seal?

Anybody know a good source for the hollow screws that don't cost $10-15 each?

I have another used carb I bought that I haven't had time to mess with yet, but I do know both the squirters were leaking. Don't know why that didn't clue me in this could be the problem with the carb on the car!

Looks like the threads stripping on these is a pretty common issue. Maybe because of the slots? ...and aluminum. Seems like a bad design in combination with metal gaskets.
I bet the other carb has the same problem, so I want to buy 4 hollow screws and do them all.
The heli-coil kit is already $40, but has 15 inserts.